Rounded off tapered edges of remaining flange strips. Deburred holes in all flange strips of left spar. Cleaned up edges of W-606F & G on Scotchbrite wheel. Deburred holes on spar doubler. Cleaned up spar doubler edges w/file. Sprayed acid etch on all spacers, left and right spar, right spar doubler, and all right spar flange strips.