Wet Paint's worst nightmare ... DUST!

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Best Idea is clean a floor area with a broom.. vacumes tend to kick up more dust than its worth or if you have one of those swifter sticky mops use that, then use the tarp and build a little clean room.. there will be no other real way to do it as effective, Just remember not to stick around too long inside your little clean room when your done painting, or you might never come out.. =)