lol, the da will work out quite a bit if done right BUT its not a cure-all for heavy urethane wave. it will only go so far. 50% of it is in the sanding and the other 50% is in the spraying. alot of the urethane wave comes from spray technique. spraying too heavy and too close. also keep in mind that the wave doesnt come from the clear alone. every coat of product you put on over blocked primer will contribute to wave. sealer, base, etc. this is why clearing, blocking flat and reclearing makes such a huge difference. to get a panel really flat without a ton of hand colorsanding the clear, you need to clear, block with 400 then reclear. on the second clear session, reduce a little and spray maybe 2" further from the panel than you normally do and dont spray it heavy. you dont need the clear to really flow out. most of us try for this glass like finish but you are better off on the final clear to make it a little peely. more like a oem ford truck. then use a da with 1000, 1500, 3000, 5000, compound, polish.