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I agree with DAYCLONA, use the best,most effective and the cheapest, paint mixing stick, it doesn't fail, foam blocks will only smooth out the orangepeel and you still end up with waves, I wrap mixing stick a few times with 2" masking tape than wrap the paper around it and go at it



I have sanded many many vehicles with a foam block and never had ripples or waves....Believe me if I did our uber picky customers would be throwing a fit.