clear sprays...tamiya or testors wet look...whats the best...

[martinfan5]

Mr Hobby Super Clear, worth every penny

[AzTom]

For those who still think red dye "leaches" out of plastic, try this:

Spray a red plastic body (or underside of a red interior, or whatever) with Testor Wet Look Clear. Let it dry however long you wish. This stuff comes right off with rubbing alcohol. Put some rubbing alcohol on a white rag or paper towel and wipe the TWLC clear off the red plastic. Does your white rag or paper towel now have any red or pink coloring on it? NO. Is the red plastic any less red than it was before? Again, NO.

Again, for anyone who thinks this happens, tell me the chemical you can soak red plastic in and "leach" or "bleach" the color out of it without harming the plastic itself. If any kind of paint will do this, there must be some chemical that will. Only way any chemical can get any color out of plastic would be to dissolve the plastic itself (MEK, lacquer thinner, acetone, etc.) and that is a completely different problem. No one has yet mentioned that the red plastic underneath was wrinkled, crazed, matted, etc.

As I mentioned before, my own theory is that red has a light wavelength that is better able to penetrate covering paint than other colors. (No one ever complains about bleed-through with blue or green plastic.) The clearcoat might be allowing light to penetrate through to the red and then back out again more efficiently than a less glossy coating, or something like that, I don't know. But I DO know that no dye is coming out of the red plastic.

Well, I'm still with the "Bleed" theory. If your theory is correct then if you scraped the pink finish off of the red plastic it would then be white again. That is not the case in my experience.

I painted Revell red plastic floor pan with Model Masters lacquer white primer, then Model Masters lacquer off white. No pink at either step. After proper drying time I sprayed on clear coat, Krylon crystal clear acrylic and within about ten minutes the thing turned pink, real pink. I waited until it was just dry to the touch and did a scrape test. The pink layers came off easily down to the red plastic and the underneath side of the removed paint was dark red. It did in fact soften the plastic.

Reading the can of acrylic clear I found out is does contain acetone, tuluene and xylene. I also noticed the are in a Do-It can of fast dry Enamel clear coat I have.

My conclusion is test the clear before spraying. Even some of the acrylics are too hot to cover model paints.

[Snake45]

The pink layers came off easily down to the red plastic and the underneath side of the removed paint was dark red. It did in fact soften the plastic.

Well there ya go. If you dissolve the red plastic, of course it's gonna turn stuff red (as I believe I mentioned above).

BTW, I've used that Krylon Crystal Clear and never had it attack paint or plastic. I used it on the two white interiors I showed above (albeit in a very light "mist" coat). My only complaint with the stuff is that it is VERY thin. You need a minimum of 10 or 12 coats of the stuff to get enough of it on to polish. I cleared a '65 Corvette with it and thought I never would get enough of it on to buff out.

[martinfan5]

I painted Revell's Raptor white, no bleed through , clear coated with One coat , I should mention that I before the primer, I did a coat of silver.

[AzTom]

Well there ya go. If you dissolve the red plastic, of course it's gonna turn stuff red (as I believe I mentioned above).

BTW, I've used that Krylon Crystal Clear and never had it attack paint or plastic. I used it on the two white interiors I showed above (albeit in a very light "mist" coat). My only complaint with the stuff is that it is VERY thin. You need a minimum of 10 or 12 coats of the stuff to get enough of it on to polish. I cleared a '65 Corvette with it and thought I never would get enough of it on to buff out.

I'm sorry, I misunderstood your theory. I thought you were saying it was NOT the paint breaking down the plastic causing it to bleed through but it was light waves penetrating two-three coats of paint.

If you have light from the back side of the plastic it could show through a thin layer of paint.

[Snake45]

I'm sorry, I misunderstood your theory. I thought you were saying it was NOT the paint breaking down the plastic causing it to bleed through but it was light waves penetrating two-three coats of paint.

If you have light from the back side of the plastic it could show through a thin layer of paint.

If something in the paint actually breaks down the plastic, and softens or crazes it, then of course you could get some "bleed." You'll certainly get this if the red is paint. But some seem to think that something in paint is magically sucking the pigment or "dye" out of the plastic while leaving the plastic itself intact and undamaged. As I've said, if this were possible, you should be able to soak a body in such a chemical and bleach the color out of it (which would solve the problem).

And yes you're right about light coming through the "backside" of plastic and changing the appearance of the color. I carefully polished out a red Revell '63 Vette body, but when I painted the "headliner" black to match the interior, the roof was obviously darker than the rest of the body. I had to paint the entire inside of the body black to even out the color.

[AzTom]

If something in the paint actually breaks down the plastic, and softens or crazes it, then of course you could get some "bleed." You'll certainly get this if the red is paint. But some seem to think that something in paint is magically sucking the pigment or "dye" out of the plastic while leaving the plastic itself intact and undamaged. As I've said, if this were possible, you should be able to soak a body in such a chemical and bleach the color out of it (which would solve the problem).

Well that is what turns the finish pink.

On my floor pan, the finish looked great, it just, turned pink when clear coated. After it completely cured it was a nice hard finish with no indication that the plastic actually bled though to the surface.

[Rufus]

On 7/5/2015 at 9:54 PM, Snake45 said:

Yeah, that didn't happen.

Not sure why you are so adamant that color isn't leeching through the paint.  It can happen if the paint being applied is not compatible with the plastic as it can dissolve some of the surface area and cause the colored plastic to bleed through the paint.  I think you are assuming that they are claiming that the dye in the plastics is the only thing that is coming through, I would doubt that too, but I wouldn't doubt that some of the plastic along with the dye is melting and coming through the paint.  Some paints are even designed to slightly melt the plastic they are sprayed on to create a better bond between the paint and the plastic being painted.  

You remind me of my grandpa that swore up and down that a 35mm camera couldn't possibly have a mirror behind the lens because it would keep the light from hitting the film.  He was raised when they had range finders and never kept up with technology... I suspect you haven't kept up with the different chemicals used in modern paints.  

[stinkybritches]

1 hour ago, Rufus said:

Not sure why you are so adamant that color isn't leeching through the paint.  It can happen if the paint being applied is not compatible with the plastic as it can dissolve some of the surface area and cause the colored plastic to bleed through the paint.  I think you are assuming that they are claiming that the dye in the plastics is the only thing that is coming through, I would doubt that too, but I wouldn't doubt that some of the plastic along with the dye is melting and coming through the paint.  Some paints are even designed to slightly melt the plastic they are sprayed on to create a better bond between the paint and the plastic being painted.  

You remind me of my grandpa that swore up and down that a 35mm camera couldn't possibly have a mirror behind the lens because it would keep the light from hitting the film.  He was raised when they had range finders and never kept up with technology... I suspect you haven't kept up with the different chemicals used in modern paints.  

Did you really use your first post to dig up a 6 year old thread and insult someone?

[Rufus]

9 hours ago, stinkybritches said:

Did you really use your first post to dig up a 6 year old thread and insult someone?

When searching the forum for something I came across the rantings and couldn't ignore the ignorance of it.  When someone is wrong it doesn't matter if they are wrong now or 10 years ago.  And as near as I could tell no one was correcting him which means god knows  how many other people might fall upon the thread and get coned into believing his misinformation.  

[NOBLNG]

6 hours ago, Rufus said:

When searching the forum for something I came across the rantings and couldn't ignore the ignorance of it.  When someone is wrong it doesn't matter if they are wrong now or 10 years ago.  And as near as I could tell no one was correcting him which means god knows  how many other people might fall upon the thread and get coned into believing his misinformation.  

Well thanks for stopping by to enlighten us all. Have a nice life.

[Snake45]

31 minutes ago, NOBLNG said:

Well thanks for stopping by to enlighten us all. Have a nice life.

I'm still waiting for someone to tell me the name of the chemical that will bleed color out of styrene (without actually dissolving the styrene itself), or show me a painted body that supposedly "bled" that was lighter in color after paint stripping. Perhaps Rufus here will be The One to lead us all out of ignorance. 

[Snake45]

On 7/8/2015 at 9:13 AM, Snake45 said:

 

Okay, I did that. Started with the underside of the very red interior tub of an old Monogram '65 Mustang 2+2.

 

1. Laid one HEAVY coat of Walmart HomeShades gray primer on whole underside. Let dry two hours. No crazing of plastic.

 

2. Masked off one side, laid one HEAVY coat of Walmart Color Place white primer on the gray on the other side. Let dry two hours. Removed masking.

 

3. Examined closely. No red or pink "bleed" on the white half. If you really really worked at it you might be able to see just the faintest hint of pinkish on the gray side, but you'd have to be looking for it. And be generous about what you called pink. (A second normal coat of the gray primer would have handily killed even that, as the white primer did.)

 

4. Masked off back half of both sides and laid one VERY HEAVY coat of Testor Wet Look Clear on the front half. If TWLC were going to react with ANYTHING underneath, this wet, drippy coat should have done the trick.

 

5. This morning, removed masking. Absolutely NO tonal or color change between the naked and Cleared white half. The Cleared part of the gray side is now very slightly darker than the naked part, but IME that's normal when glosscoating flat paints. No increased hint of red or pink on the gray side (or on either side, for that matter).

 

Maybe all I've proved is that Walmart Primer is tough stuff, and very opaque. Those are the facts; I lay them out here for everyone to interpret as he or she wishes. (This isn't worth taking and uploading a picture of--it's just an interior tub with one side white and one side gray. Had I gotten any red or pink at all, I'd post a pic.)

I did eventually take pics of the red interior shot with white as described above. Here's a couple of them. 

[Xingu]

7 hours ago, Rufus said:

When searching the forum for something I came across the rantings and couldn't ignore the ignorance of it.  When someone is wrong it doesn't matter if they are wrong now or 10 years ago.  And as near as I could tell no one was correcting him which means god knows  how many other people might fall upon the thread and get coned into believing his misinformation.  

There are those that believe the color bleeds thru and those that believe it does not. No need to call anyone ignorant because they don't believe what you believe. Abusive behavior is not tolerated here, so consider this your one and only warning.

You are free to post your opinion, experience and test results. Just don't do it at the expense of other members.

[Tabbysdaddy]

Long story short, bleeding through the paint and showing through the paint are two different things.