If you are doing a makeup mmprising several overlapping pieces, there should be a pre-established order in which to apply the pieces:
1. Before applying any adhesive, position the piece (or each piece one at t a time) and check it for a proper fit. Ordinarily, any flashing is left on t the piece until application. If the piece needs to be trimmed, do it very I
carefully; . trimming is often best achieved by hand-tearing the flashing aaway, keeping the blending edges thin and slightly irregular. It is easier to adisguise an uneven line than a straight one.