Hoodaddy,
I skim coat whether I am going to foil or not , when I say skim coat what I do is dip a clean rag into a thinned epoxy mix and rub it on the blank so that it just barely soaks into the wood, then I let it cure overnight, I then foil the bait, texture it ,then epoxy the whole entire bait(seal), I have never had an issue texturing the foil, the skim coat gives the "sealer coat" something to stick to! I used to use a sanding sealer but found that there was a delaminating problem when using different products (epoxy over sanding sealer)