It's much easier to work with a textured surface as opposed to textured foil on a smooth surface. You can press and rub as hard as you want without smoothing the details out. Lightweight mesh (like veil material) cut to shape and glued to the wood works nice for textured scaling also. Wait until the epoxy is partly set up and tacky before attempting to make the edges lay down along the curves. Then lightly press and rub over them with a pen or something round and smooth. I use the handle of my exacto knife.
On these smaller baits I use thin leafing foil. They get a coat of epoxy to seal and hide the edges before paint. I have used standard gauge Reynolds Wrap foil which works good also but generally only on larger musky baits that get multiple coats of epoxy and paint. HVAC tape can be used also. Here is that bait finished.