Rob,urethane wave is the flutter or cellulite look when you sight down a panel. It alot times looks like ripply bodywork. If you have sprayed any of the high solids european clear's you'll see what I'm talking about.1000,1500,2000 has been good rule of thumb on what works on most clears but with the european stuff you really need to step up with something coarser if you want to cut it crisp and flat.Hope that clear's up any questions you had. see ya Joe.
