The more I thought about it, I think I know what happened. When I ordered clear and activator, I ordered 1 fast ,2 normal, and 1 slow. Temperature when I cleared the fenders and doors was low 60's, and I used the normal activator. Everything came out great. The next day I cleared the bed, but temperatures were in the low 70's. Having mostly normal activator, I used it on the first coat, then waited 30 minutes before spraying a second coat mixed half normal, half slow. Waited 30 minutes, then sprayed a third coat with slow activator, The bed looked pretty good with only a little trash and minor orange peel, until I started sanding to buff, then the wave really started showing. What happened, I believe, was the first coat locked up so tight I had to slow down or move closer to get it wet, then the third coat same thing, compounding the problem. I always use slow or very slow but temperatures had been cool, and I got away with the normal on the smaller panels in the cool temps, but not on the larger panels in slightly warmer temps. Lesson learnedThe urethane wave was terrible. I can't for the life of me figure out what I did wrong,