Anytime, Chuck. In the mid 60s, wrinkle paint was a fad. You probably remember. People used to paint dashboards in wrinkle paint to get a more glossy look with less reflection...or just a "cool" look. Some guys wanted steering wheels painted wrinkly to make them easier to grip. The problem was if you dribbled something like a milkshake on the paint it wasn't easy to clean. Mustard was impossible. A friend painted an entire Jeep in wrinkle finish, but I never liked it.
There were two ways to make plain old enamel "wrinkle". One was to thin enamel with a very slow drying reducer and spray that on first. Then before that had dried completely (just tack free), thin some enamel with a fast drying reducer and spray it over the top. Some of the more adventurous guys would use 2 colors...yellow first and red second was popular. The valleys of the wrinkles would be more orange/yellow looking while the high ridges would be red so the effect was flame-like. Or dark green first, tan second and then mist dark brown over it unevenly. You would get a textured camo look of sorts.
Then the other way was to get some tung oil (used commonly in wood finishing). Add some to enamel before you spray. The theory there was the oil would form an interior layer in the paint as the oil molecules would seek out other oil molecules once the paint was sprayed. The oil stayed in the middle because the top part of the paint dried first (enamel does that...dries from outside to inside). Then the lower layer would remain wet forming wrinkles as it finally dried. But...this didn't always work as hoped because there were no formulas and it wasn't uncommon to mix an enamel that took forever to dry and came out with a milky finish. Plus sometimes you'd get little tiny wrinkles and other times you'd get really large odd looking wrinkles that looked more like worm tracks in mud or like your paint had run strangely.
If you ever need to buy some enamel and spray it yourself, get a gizmo called a PreVal sprayer. It is a glass jar, marked for measuring with a pressurized canister that screws on to it. Then you add your paint, thinner, hardener (if needed) and spray it just like a rattle can. What's neat about this is you can use it where a compressor and spray gun might be overkill. I've painted many firewalls this way while the engine was out being rebuilt. You get to control the paint and thinner you use (plus the thinner/paint mix ratio) and aside from the pressurized canister it is reusable forever. The one I have was bought in 1978. You can get 2 on Amazon for about $12 and each one will spray 16 oz of paint...which as I said is enough to paint a firewall nicely. Or two running boards.
