thx man... i bought the thinner at home depo, it contains mineral spirits also. the spray makes alot more of mess then the roller thats for sure.my concret is all green i think your roller method is fine.lots of shine when you showed your pictures...less wet sanding too. i think it came down to the thinner (maybe) and the buffing. how you appy it is different but how it goes on is the same...one goes on faster then the other...one has to be wetsanded more (maybe) i couldnt adjust it right so it wouldnt get orange peels but eithe way we both end up wetsanding it...one more then the other...so no more $50 dollar paint job if you buy the gun. take your pick you live and you learn.

now its time to paint the dog house...hehe