I painted my sisters car a couple weeks ago and this last week I wet sanded it flat, followed by buffing it. When I was done I noticed a bunch of pin holes in the clear on the roof. I assume it is from the body filler(possible air bubbles). What's the best/easiest way to fix this? I am using all PPG paint products. Thanks... Wesley
If its in the clear the only way to fix them is to sand it out and hope you don't go into the base then reclear. I don't know of any magical fix, usually the reason for your problem is you put way too much clear on at one time. Or didn't wait enough between coats. When you do that you trap the solvents in the clear and they can't escape. So what happens is the solvents from the bottom layer get trapped on their way out. Good luck man -Zipp
I tried sanding them out with no luck which led me to believe that they are in the filler. Is there anything out there besides skimming some glazing puddy over the filler? Thanks...
If it was in the filler you should have seen it before you painted it but thats a little late now. That sucks man. I wouldn't fill em I'd block it out, reprime it and paint it. I'm willing to bet its either fish eye "it wasn't clean when you painted" or the pin holes are in the clear. I don't know man its hard to tell from words but if it wasn't there before you painted then its not in the filler IMHO. Have you sanded it down to the base? you can block it out all the way down to the base and make sure you feather it out as much as possible. Then re-base and clear. Well good luck man -Zipp
O I just thought of something, how long did you wait until you buffed it? If you buffed it and got the paint too hot it can cause wierd things also. If its in a small spot you may want to just leave it unless its totally obvious. A lot of people don't use enough water when they buff or stay in one spot too long and really screw up the paint. Just another thought -Zipp
You'll have to consider what how far the holes are. If the holes are like you say, pre-primer.. you'll have to redo it over.. especially if its plentiful... instead of spot putty, maybe a High fill polyester primer. Much easier to sand than Putty/filler. Or else I would have suggested for you to just re-clearing at HIGH volume to be blocked off afterwards. done it many times to fill fish eyes and craters from dirt and solvent pop. Good luck! -Ness
usally if you blocked the primered surface all the dust and crap go's into the bodyfillers pinholes and if these get missed they will not open back up usally untill clear is applied do to the amount of solvent being layed on.. this is called the bridges of hell.. it is pretty hard to tell?? I would highly reccomend posting some pics before you try and attempt to repair!! so you can pinpoint the problem right off the bat instead of creating more work for your self
Fish eyes.. solvent pop ????? I dont care if its ppg or whoever. If the surface isnt prepared right you can have problems. If there is enuff clear on the thing the pinholes should sand out if not then its reclear time.. Dave
Yeah I agree, post some good pics if you can it would make it a lot easier to try help. So many different things can happen with paint its ridiculous, that's why a lot of people leave it for guys like us that like the aggravation .
yes indeed! Rule #1 of body/paint (and similar trades) is if it aint prepped right, it aint gonna come out right. we all learn the hard way, the first time.
if it is solvent popping in the clear mix up a small amount of clear and dab it in the solvent pops, let it fully dry, wet sand, and re rub. dont laugh , i have done it and it works.
If the pin hole are actaully pin holes and they aren't too deep and wetsand and re-clear the piss out of it concentrating on the bad spots. If you run it, no problem thats an easy fix as compared to repainting the entire panel.
Man I would have said vinyl top it or cut the roof off... Honestly kinda hard to say w/o looking at it. Could be several different issues. Pretty much anything brought up here already.
sounds like solvent pop to me sand down best you can reclear and then wetsand and buff agin sucks though
Thanks for all the replies. Heres what I did for prep. After shooting and blocking it twice with primer filler I used wax and grease remover with air several times to clean the surface. I would then use a tack rag as often as I could. This is what we do at the body shop I work at and I've never seen any problems with it. Before I started wet sanding the clear I waited a week. I started with 800 and took it all the way up to 2500. Buffing was done with foam pads at a minimal RPM and with constant movement of the buffer. I believe that part of the problem might be that I am a body man. Just a guess. I will try to post pictures later tonight. Again thanks for the feed back... Wesley
I looked the car all over again tonight. I ended up finding one more spot that had the same problem. And in this area there was no body filler. So that cancels that out. Here are the pictures I took tonight. Let me know what you think... Wesley
yep solvent pop sucks. happened to me on my camaro (cough). If you use too fast hardener/reducer, the clear starts to dry before the solvents can fully evaporate, and as the solvents do evaporate, it creats holes. Normally the clear would continue to flow and you wouldnt have any holes.. anyways.. yes you can let it cure, mix up some clear, and dab it into the holes so it fills them creating a bump, and then let it harden and sand the bumps smooth and buff. It works well. or you can just sand it with some 800 without breaking through the clear or trying to get those holes out all the way, and put on a couple more coats until they are gone and filled (be careful, runs suck). If they were in the bondo, the same mothods would still fix it on a color where the pinholes werent noticeable. If it were a silver or something, you would see the pinholes through the basecoat real bad and youd just have to repaint. good luck. PS: upon close examination of the pics, those look like bondo pinholes to me.
You can fill them with clear but you still will be able to see them if you look close enough . You say you work at a body shop, dosent anybody there know what the problem is ?
Its really hard to tell from here... I've never dabbed clear on the pin holes but it sounds like a good idea. That sounds like the quickest fix to me and if it doesn't work its a whole lot less work than redoing it. I'd say try it, if it doesn't work then redo it. But it almost looks more like fish eye to me or maybe your getting moisture in your air lines. Try using one of those disposable pre-filters that you hook up to your air-chuck on your gun. It could be a whole lot of different things you'll just have to try and fix it as best you can I guess. Good luck man -Zipp Hope I was a little help
i agree that it looks like bondo pinholes.... could be some funky fisheyes, but doesn't look like solvent pop to me... they don't look deep enough to me to require primer, i would think you could just sand the material that's there down and the clear/base you sprayed should be enough to level it off. i'd use some sealer over it thought before re-base/clearing it though...
Bad prep, too much or too fast hardener. You said you were using PPG which clear and hardener?? DC3000 or DC4000 and DCH 3085?? What temp were you spraying in?? This can help you learn but to fix it, I'd rub out as much as you can and then re clear. making sure you have it right this time.
what happens when you sand it!! see if they flat'n out or what!! its hard to see in that pic but you said this happened in areas were you had no bodyfiller so i am guessing solvent pop/fisheyes if this is true you should be able to just blend in some clear on just those pannels??
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