If it's a large piece like the red, I will remove the underlying covering. For the gray swoosh I marked the boundary of the piece and use a woodpecker (with only two wheels installed due to the width) to prep the surface. You have to use a fresh blade for these cuts because you want to minimize the depth of the cut so as not to slice through the balsa sheeting. After I lay each piece down I'll wipe the area clean with Monokote trim solvent (nasty smelling stuff but it works great) to clean off the ink and seal the edges.
Last edited by pappy35; 04-03-2017 at 05:47 AM.