Doverham:
I shall avoid criticism of the Galazan technique. Suffice to say, don't try it. First, smooth the rubber to at least 400 grit finish if it's rough, Then simply coat the pad with something like Tru-Oil or other quick-drying stock finish. It will take up to 10 coats to get it to retain a surface that's slick. But stick with it. The dry time between coats will also be extended. All this assuming your pad isn't one of the newer "recoil absorbing" types. If so, you're stuck.... with duct tape??
Also, the finish you apply will flex fine. As it gets older it will crack a bit, but that just looks better.
Best, Kensal
