Troubleshooting Unwanted Crackle
I have heard that you can put catalyst in the vinyl when putting a catalyzed finish over it. I didn't do that. Is that what caused the crackle to happen? Or is there something else going on here?
From contributor B:
Primer is made to go over raw wood. Primer over anything else makes a real good crackle finish. I would either go with the vinyl or a 2k isolante coating over the original cleaned and sanded existing finish and then build with a sealer if needed or go directly to your pigmented finish or clear coat.
From the original questioner:
The chairs are done and the guy is happy. Why not? It was free.
I just wanted to know what was causing the crackle. I have put the primer over lots of things except vinyl sealer. That includes lots of clears and even cured pre cats without a problem.
I was pushing things. I really didn't let the vinyl dry for long, maybe 20 minutes at 72F with airflow. I sanded it and primed. The vinyl was a bit rubbery while sanding, but it always is, even when dried for hours.
From contributor A
Glad things turned out ok, but as a rule, you should not put a post cat over a pre cat. That's why the vinyl sealer has the option of being post catalyzed .You can't put a hard finish on top of a soft finish, but you can put a soft on top of a hard finish without surface tension problems.
From the original questioner
I know that, and it isn't something that I do normally. But when I am spraying clears and pigments on the same cabinet I have areas that I don't care about, like the bottom of the cabinet on a lower, I don't have any problem with wrinkling.
From contributor B
"But when I am spraying clears and pigments on the same cabinet I have areas that I don't care about, like the bottom of the cabinet on a lower." In those situations I use a pigmented sealer. Works great and dries fast. Just tint with a compatible UTC colorant.
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