Ive done wrinkle paint from a spray can on engine and dashboard parts, and the directions did NOTt say 'heat the poo out of the freshly coated part'.... I had to use 150F in an oven for about 15 minutes to get consistent wrinkles. If you use an oven, might be a good idea to remove any plastic or rubber from whatever you are wrinkle-painting. Don't remember the brand of spraypaint now.
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