We are in the process of painting our 1964 Shasta Compact. On the advice of a friend, we started to paint the top part of her white using an Oil based exterior paint. Before painting a second coat tonight I sanded some very small mistakes. I noticed that some spots sanded off smoothly with no problem. Other spots, however, took the paint off right down to the aluminum. It was almost like the paint wasn't dry enough but I let the first coat sit for almost three full days. I used my finger nail an was able to remove paint but it was not tacky to the touch.
I used Rust-Oleum Self Etching Primer. Than Sherwin Williams Protective & Marine Coatings Industrial Enamel paint. I was assured that it was a safe combination to use but I'm starting to doubt the advice I was given. Before I paint anymore I need advice from a community like this one who has better knowledge. Is there anything differently I could have done or used? Should I start over with a different primer and paint? Would using a clear top coat help harden an protect the paint? I would appreciate any help.
Post by turbodaddy on Sept 19, 2018 18:40:20 GMT -8
I'd advise patience. Let the paint have time to dry (cure). There may have been areas where it had been applied too thick. Weather, humidity all sorts of things can make us think we've done something "wrong".
Oil based paint especially if applied over fresh primer can take thirty days or more to dry. I would wait a while if it was me. Also if you didn't allow the primer to dry completely that makes it much worse. Many products have a re-coat time,you either have to do with in a certain time or you have to wait till at least a certain time. I agree with the thought mentioned above, I always try to use the same brand materials as so many brands are incompatible any more.
Post by CorvettCrzy on Sept 20, 2018 15:23:10 GMT -8
Cure, Cure, Cure.... We recently painted our trailer the second week of June. We left for a 2 week vacation, 2 weeks later and drove none stop for 24 hours. When we stopped bugs were embedded in the paint. Our vacation saw temp in excess of 114 degrees and even though we stopped to try to rinse some of the bugs off. When we got home and I gave it a bath, the paint came off with the bugs. We also had some peeling in some creased areas, which I believe was due to not getting the creases clean enough before paint.
Now the paint is tough, pics of our recent sanding:
I'm going to be posting some more info on my 58 Corvette thread.
It seemed pretty obvious that the paint hadn't cured, even though the temps had been warm for Michigan and the humidity and dew points were "right" when we painted. I think 30 days is a good estimate. Longer if you're patient.
Since then we lightly sanded and repainted a section that had peeling, and we are getting ready to repaint the lower half completely because it was too thin. We've sanded it all and now that it's cured we haven't had any peeling during the process. The small repair/paint the we've already done had no issues.
After it's painted it may just sit through the winter. If we use it, it will be a very short and slow trip.
True Wisdom isn't learning from your mistakes, It's learning from other's mistakes!