Tell ya what; I'll just post what I found; hopefully it'll help others.

We used the JDBB with about a 10/1 mixture of mineral spirits as a thinner. I had read on another forum that the JDBB / JD thinner / hardener mix dried very quickly and caused streaking.

We had masked off the original Polar White and shot gloss white onto it after the first coat of JDBB. We did not shoot the gloss over the black.

After about 18 hours (the following morning), I tried wet-sanding the JDBB with 600 grit on a rubber block. The paint was so soft that it balled up, and the water left heinous streaks in the JDBB that would not come up. Even then, handprints burned into the finish, and I made the mistake of leaning my jeans against a fender -- it left a Silly Putty-like impression of the fabric that had to be sanded out.

We reshot the sides after about four hours of extremely frustrating sanding. This was Sunday. It's now Wednesday -- it's had two full days of 60-65-degree sunshine -- and I'm told that the paint is finally hard enough to finish sand. I haven't seen it; it's down at my father-in-law's house, some 40 miles away.

I've read on other forums that though the flash time is ~15 minutes, it takes the paint 36 hours to cure; I would think that the 36-hour figure is for, say, Southern California in June. We found about a 20-minute window to shoot touch-ups.

The mineral spirits gave it a nice shine and it cured and hardened to a beautiful satin finish. I'm happy with the finish now; it's just a twelve-letter-word to work with.

Hope this helps.

- Joey