Slampert,
Consider bedding the silk span using KK clear paint rather than West Systems. It's only slightly heavier than doping the silkspan down. But it adds a little ding resistance; its epoxy after all.

another possibility is to use light silkspan but use this material only if you have some experience with medium. Nevertheless, the technique I use with light silkspan is to hang it from a frame with a couple pins and very lightly spray it with water to loosen the fibers. Then it is gently placed on the panel and tacked in place with dope around its edges. This is allowed to dry completely. It's the most important step. It dries as tight as the skin on a grape. Only Then is it doped down into the wood, absolutely wrinkle free.
You probably want to try the technique on scrap first before committing to the work. It's the lightest and thinnest covering possible. It fills faster than any of the papers we have discussed and it is ready for primer after only a couple coats of sanding sealer which is nothing more than the dope or lacquer you used for the bedding with some baby powder filler. Or the sanding sealer could be KK clear with the Johnsons added