Everyone I know has used Krylons wrinkle black finish Or i've heard Harley Davidsons wrinkle black is dead on but good luck spraying it, i bought four cans and not one sprayed it decent enough! It's true, you have to have a warm day!

Personally, after i primered it i sprayed it with a heavy coat and slid it into the oven--put it on 400 degrees and after only a minute or two it wrinkled right up. You can do it in the sun but you may get mixed results, an oven gets even results all of the way around