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primer trouble.


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#1 blueoval92

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Posted 06 November 2012 - 04:24 PM

I have never had this trouble before but on my current project i sprayed my usual duplicolor primer and a coat of filler primer to fill any pin holes then sealed it with primer sealer. have done this on all plastics i have ever painted even my model cars and all the primers are from duplicolor. I sprayed my paint and let it cure for the past 3 days and just looked at it tonight and i had what looked like file marks on the roof, i sanded the roof down to the primer and it looks like someone took a small rasp and passed it in a small spot. i sanded a little more to the plastic and its smooth as can be. was only in one spot but i have to strip the whole body. has anybody ever had this problem?

#2 Ace-Garageguy

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Posted 06 November 2012 - 05:47 PM

Haven't had that problem. Curious as to why you use sealer, and why you have to strip the whole body. I've been able to touchup Duplicolor primers very easily, as I do a lot of custom work that needs repeated primer applications in limited areas.

#3 blueoval92

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Posted 06 November 2012 - 05:55 PM

i use the sealer because i find it gives a little more gloss to the paint, and its how i have always painted other things so i do it out of habit, have never had trouble until now. the reason i have to strip the whole body is because of the paint im using, its duplicolor's copper plate system and the way i sprayed it makes it very difficult to repaint just the roof and make it all match with the way i faded the rest of the body. the body was already painted and i was about to spray the clear when i noticed the imperfection.

#4 Erik Smith

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Posted 06 November 2012 - 08:50 PM

What kit? Sounds like maybe some ghosting? I use Duplicolor primers and some plastics - newer Revell kits in particular - seem to ghost worse than others. I also think the sealer is a little "hotter" than the primer and may cause more issues - that is an unscientific guess, though, just basing it on a couple occurrences.

#5 blueoval92

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Posted 07 November 2012 - 04:56 AM

its the amt 3 in 1 1925 model t kit.

#6 Guest_G Holding_*

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Posted 07 November 2012 - 10:33 AM

Sounds like too much paint in a short time. I use all of the above paints, yes they are "hot" and as lacquers soften the coat(s) under I suspect you just crazed the roof. I wait 24 hours or 4 hours deyhdrated between recoats of primer...the "primer filler" is the thickest, and will take the longest to dry

#7 CadillacPat

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Posted 07 November 2012 - 11:33 AM

You're using 3 steps of Primer, Why????????

What is the final grade of sandpaper that you used to get what you say is a "smooth as can be body"??

Proper Body Prep allows you to use less paint, paint should not be used to make up for Body Prep.

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#8 blueoval92

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Posted 07 November 2012 - 11:49 AM

like i said i do it out of habit, ive never had trouble with this until now and i usually allow about a day for all primer to dry before i spray and color. final grade of sanding is 3k and i never use rougher than 800.

i checked it a couple hours ago and was able to peel off some paint from the area that messed up, the plastic is smooth as can be, the primer is what messed up.

gonna let it soak some more over night and scrub it down and try again.