-
Posts
39,239 -
Joined
-
Last visited
Content Type
Profiles
Forums
Events
Gallery
Everything posted by Ace-Garageguy
-
2K question? Solvent pop or contaminant issue?
Ace-Garageguy replied to Dpate's topic in Model Building Questions and Answers
Honestly, it looks to me like you might be able to sand most (maybe all) of the divot down flat, then polish it as usual. You'll need to cut the divot flat, so you'll need to use a sanding block of some sort. I'd recommend hard rubber. Just sanding with no block, you'll ride over the divot without knocking it down, and there's also the likelihood you'll make a wave. Work carefully and don't get in a hurry...because you don't want to go all the way through the clear. If you DO, you'll have to reshoot the blue too, so stripping it would be best if that happens. Use plenty of water and squeegee it off frequently to see if it's flat. 4 coats of clear will most likely be enough to sand that out without even having to shoot more clear. Still, the worst case will be having to shoot the whole hood, which really isn't too bad. AND...the problem with trying to only airbrush the sanded area is that with 2K, you'll get a "blend edge" that won't polish out, because catalyzed clear doesn't re-wet like lacquer. -
Yugo became Yu-no-go after a rash of crankshaft failures.
-
Telemarketers, especially scammers, go to a special circle in Hades that hadn't been invented when Dante wrote his Inferno, well below circle nine.
-
2K question? Solvent pop or contaminant issue?
Ace-Garageguy replied to Dpate's topic in Model Building Questions and Answers
"Solvent popping", by the way, looks like extra metallic particles, or sometimes light areas in the clear, particularly where it's heaviest. What it actually IS is thousands of tiny bubbles trapped in the clear, bubbles of solvent vapor that couldn't evaporate because too many coats were hammered on too fast with insufficient flash time, or in elevated temperature and humidity that made the material "kick" before solvent evaporation was complete. The bubbles will NOT sand out, and the only fix is to remove the entire coating and do it right. EDIT: I've been using "2K" products since they were first introduced to the automotive body repair and paint industry decades ago...on full-scale things and models. EDIT 2: Worst case of solvent-pop I ever had to deal with was on a Superformance Cobra repair I did for Chuck Gutke at Cobra Restorers. The temps were in the high 90s, as was the humidity for days on end. Every shop in town was shooting their paint late at night, because in many cases, even the slowest reducer and hardener wasn't enough to keep clearcoats from popping. I shot the car twice in the daytime, it popped horribly...and I had to sand it all off. I finally shot the thing at 04:00, and it was OK. I've pretty much seen it all. The chemistry and problems are identical. -
2K question? Solvent pop or contaminant issue?
Ace-Garageguy replied to Dpate's topic in Model Building Questions and Answers
The divot is a fisheye due to contamination. Could be a single piece of dust that has silicone residue on it, or even a piece of pollen. And it's nothing remotely like "solvent popping". But boy howdy...that clear sure looks like you hammered it on thick and fast...and that IS a good way to get solvent pop...which the divot is NOT. -
What's with the U.S.Post office these days?
Ace-Garageguy replied to styromaniac's topic in The Off-Topic Lounge
Exactly. -
I don't know what paint you used, but I can tell for sure it is way too hot to use on styrene model parts, particularly the soft junk they're using now. "Too hot" means the solvents are too aggressive, and will attack the plastic leading to the very obvious "crazing" you have here. Properly applied paint, even metallics shot "dry", isn't gritty looking like that (and clear will just make it look worse). Tamiya primer is simply not sufficiently solvent resistant to provide a barrier in a situation like this, so the paint solvent soaks through it and etches the underlying plastic...crazing...and accentuates mold-flow defects like your line in the process. To get an acceptable finish on that, all the crazing needs to be sanded out, the part needs to be re-primed with something that will provide a barrier, and you should really use a much less aggressive, less "hot" color. The hood below ghosted several times after I removed the peak and sanded out some divots, and shot it in hot Duplicolor primer. I fixed it by sanding, re-primering, sanding, re-primering, sanding, re-primering until I'd killed it. The final topcoat of hot Duplicolor looks like this. Note that it's not gritty or textured. One more thing...we constantly harp on the importance of TESTING the materials you want to use BEFORE committing to painting a model...and develop some understanding of various techniques. Painting models has become considerably more challenging of late, what with much less solvent-resistant styrene being used, so testing has become critical if you want results you can be proud of. You will also find things work much better if you stay within one product line (like Tamiya) that's made for models all the way through one job. Mixing and matching hardware store/big box store or automotive paints is a recipe for disaster until you really know what you're doing...and even then TEST FIRST is the golden rule.
-
"Squish" is what I'd like to do to a lot of (fill in the blank).
-
"Cola" beans aren't related to koalas though I've seen the words confused, so you better watch out for those cola bears.
-
Rescued another abandoned feral kitten, mostly white with some black blotches, about 5 weeks old. It was weak, had to hand feed it initially, but it's eating wet food on its own now, seems strong and energetic, and will probably make it. Cute little cat, not biting me anymore, but man...I've never heard any kitten meow so loud as this one. Probably take it to the vet for a general checkover/worming/flea treatment next week, then see if I can find it a home. The outdoor male feral that adopted me after its mother got squashed in the street as it was being weaned is full grown now, follows me around outdoors like a dog, seems to know the sound of my truck, and runs to greet me when I come in.
-
1957 Ford F100
Ace-Garageguy replied to SteveKnox's topic in Model Trucks: Pickups, Vans, SUVs, Light Commercial
Like the man said, definitely impressive conversion work. I had to look up pix of a '60 to get an idea of how much you had to change. I'd imagine you'd sell a bunch if you decided to produce resin copies of all your modified parts. -
"Ago" isn't something you can start a sentence with without resorting to convoluted syntax.
-
"Humid" is what I'm moving to the desert to get away from.
-
Mazda RX-3 Bathurst 1974
Ace-Garageguy replied to ShawnS's topic in Other Racing: Road Racing, Salt Flat Racers
Very, very nice. -
TRY THIS SEARCH STRING OR SOMETHING SIMILAR IN GOOGLE: model cars clear parts glue site:www.modelcarsmag.com You'll get a whole lot of hits from this very site, all on topic, going back years.
-
What Did You Have for Dinner?
Ace-Garageguy replied to StevenGuthmiller's topic in The Off-Topic Lounge
Mighty tasty burger...but the store-prepped mushroom-onion-cheddar patties I bought (which I never do unless I'm feeling really tired after a long day) were as tough as old saddle leather. Imagine a slab of this with creamy melted sharp cheddar, sliced ripe tomatoes, sweet-hot relish, German mustard, and mayo on a stone-ground whole-wheat bun and you get the idea. -
One-half a worm is enough to catch a fish if you know where they're bitin', and if you don't catch a fish, at least you got some protein from the other half.
-
Domain changes of websites can open unforeseen cans of worms.
-
-
Bad things sometimes happen to good people.
-
Candy is dandy but liquor is...well, you know the rest.
-
Forum website has been sluggish for the last few days
Ace-Garageguy replied to peteski's topic in How To Use This Board
Now I'm getting all kinds of weird glitches. [[Template forums/front/index/forumRow is throwing an error. This theme may be out of date. Run the support tool in the AdminCP to restore the default theme[[Template forums/front/index/forumRow is throwing an error. This theme may be out of date. Run the support tool in the AdminCP to restore the default theme.] -
-
Favorites of the power structure often get the cream, while those not so loved get the contents of the cat's box.