This wasn't done on the Corvette but was a "test" to see if the SS Urethene would be applicable when the Corvette is ready. This was a diaster . I tried the Eastwood Black SS and their 2K primer on my Nissan hood.

I had a couple of dents caused by icecicles falling on the hood from our roof. I sanded those spots down to bare metal and bondow the dents and got all smooth. I did #220 on the rest. I used Eastwood Pre (wax and clean up) and then used Eastwood 2K primer. I gave it 4 coats and then, when dry, dusted with Eastwood Guide Coat, sanded with 400 and then 600. So far, so good. I then cleaned off the dust, offwiped with PRE , tack rag and then used Boulvardard Black with the 4:1 recommended ratio with Activator. The 1st coat went on with a good gloss but had “bubbles.” ?? I figured maybe they would clear out – they didn’t. I gave it 2 more coats waiting the 10 minutes between coats. All bubbles? What happened?? I used my Devilbis suction gun with 50 psi at the compressor reduced down to the gun to give me a good 8” fan. The compressor is a 1 hp sears –yea, I know it should be more but I’ve done countless lacquer jobs and recently, on my wife’s ’79 Camaro, a DuPont Choma 1 – Clear coat job with no problems. What happened here?? I’m afraid that the bubbles go down to the primer so I don't know if they can be color sanded out and don't know then if the paint will buff up shiny.

Best way I can describe it is that someone took a bunch of 7 1/2 - 8 size shot and sprinkled it all over the hood.

 

I have found out this is a classic case of solvent pop.

 

If I was a betting man....I would have to say your air compressor spit water out into the paint while shooting. Solvent "pop' will NOT occur during shooting. It occurs AFTER the paint is shot and while the paint is drying/curing.

Also...it may be due to your paint strainer not being a good one or possibly using two to strain out your paint. Also you paint gun being a suction feed style...and depending on the air cap /needle size...can be a contributing factor also. But I BET it is your 1HP compressor. They produce so much moisture...that they can literally spit out water droplets. Especially if when you used it on the lacquer jobs...the air temp was lower...versus you shooting this job on a hot day. Also the length of your air hose in regards to the compressor is also an issue.

Turn on your compressor and let it charge up...them take a mirror and a pencil blower and shoot an air stream onto the mirror and see if you see fog or water collecting on the mirror. If you do...that is one problem that will need to be dealt with. You may need to let the compressor charge up...lose air and re-fill a couple of times so that the head temperature of your compressor gets so hot you can cook an egg on it and then see what happens. Sometimes the first charge up has not allowed the compressor to get hot enough...but by the third or fourth charging...it is smoking hot.

"DUB"

 

Is that PRE OK to use on fresh primer? How long did you give it to dry?

 

Thanks Dub,
You know, my first thought was moisture cause it did look like droplets. I will do the mirror test and tell you what happens. I've done about 7 lacquer jobs and the one base/cc with this set-up and never had moisture before but who knows. In any event, I've wet sanded the hood with 220/320/400 & 600. Most all have come out and those that didn't (I'm afraid to cut any more with the course grades) you shouldn't notice. I'm hoping I can buff the SS out to a gloss but need to get some compound for my buffer. I need to get some 1000/1500 paper before I get the buffer on it.
Regards, Fred

 

Thanks Scott,
I put it on and then wiped it off. I was going to roll it into the sun and then back into the garage before the color coat, but didn't. It isn't a very quick drying liquid - certainly not like the Dupont stuff I used in the past. In the future, I think I will only use it before sanding and get some quicker drying stuff for wipeoff before the primer and color coats. I was thinking of using acetone but figured that would wipe off the primer.
Regards, Fred

 

There was no indication of moisture after performing the "mirror" test this morning but there were droplets in the filter bowl. I did not notice any moisture in the filter bowl on the day of the painting. So, at this point, I'm not sure if I had a moisture problem or something else. Here are a couple of other photos before I block sanded it that maybe show up the problem better.





And after color sanding - still have to do 1000/1500/2000 before buffing

 

If and when you go and buff it. You have small spots where the buffing compound stays ( and is hard to get out) in these small "bowl-like" craters. Then it was water or moisture for sure....and I have to stay firm on this. In one of your photo's it looks like fish-eyes...or that may just be the camera/light angle...where I am seeing white spots in the finish.

I swear that this looks like a moisture problem...OR your strainer was defective and allowed a lot of crap to pass through it. ESPECIALLY if it showed up immediately after making a pass with the gun. It all depends if these raised spots are hollow or there is actually a particle there where it was located...which in that event it could have been particles in the paint where the strainer MAY have failed.

I seriously doubt it has to do with your primer...especially if you noticed then AS YOU WERE SPRAYING it...and not some time later. A reaction will usually not occur on contact... because it needs time so the solvents will react. AND this even falls true when spraying lacquer on top of un-cured enamel. It also takes a few moments for a reaction..and when it does... depending on the strength of the lacquer thinner. It will/can wrinkle/blister/lift like crazy.

"DUB"

 

Thanks for the reply. I'm hoping after I buff it out I can just move on to the next project. Will advise.

 

which bead maker? where do I order it from? I looked on the website and they have all kinds of Bead maker spray