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I work part time preping at a body shop. We sand w/ 180 merka, wipe w/ prepsol or final klean then use tack rag. When you wipe use 2 cloths (lint free) 1 saturated w/ cleaner and 1 dry . In small areas wipe on wet then wipe dry. tack then spray. Ledt paint flash not dry between coats. If it does dry use 220 to scuff surface for next coat. Good luck.
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