UPDATE: As promised, the foiling process I use (learned it from Fine Scale Modeler):
1) Make sure the area to be foiled is clean; use rubbing alcohol to wipe away any debris, residual mold release or skin oil.
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2) apply the foil evenly; I tend to "roll" it across the surface slowly so that it minimizes air bubbles getting trapped. Run your fingernail along the edge to "mark out" where you want to trim the foil.
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3) After trimming, use a burnisher (mine is an old Xacto version with a ball on one end and a large flat plastic blade on the other) to smooth down the foil. Prick any air bubbles with the tip of an Xacto knife and smooth down with the burnishing tool.
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4) Use 400 grit (or finer) sandpaper to give the foil a "brushed metal" look; make sure to go in one direction only, and
be careful of how much pressure you use in sanding the foil. Too much can tear it and make a mess with the adhesive. For fine or detailed areas: cut the foil into smaller sections and burnish starting with a cotton swab. then move to using a
toothpick for panel lines and finely detailed nooks and crannies.
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5) After sanding the foil lightly, use #0000 steel wool to smooth it and burnish it down further.
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6) After buffing with the steel wool, go over the details one more time with either a cotton swab or toothpick, re-buff with steel wool, then blow whatever debris from the steel wool off with compressed air/ hair dryer/ your breath. Wipe down one last time with rubbing alcohol, then seal with your usual brand of clearcoat (particularly if you want the "laminated titanium" look of Robo here):
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Stay tuned...
Murphy's law head is next....