Goirish,
Save the backing from Monokote when you cover. That is an excellent plan protector, glues will not stick to it. Also, pick up vinyl sheeting at your local Lowe's or Wal-mart. It's used for dropcloth when painting. The 3 mil sheeting is more than enough for what we do, and a roll will last you for a good 8-10 kit builds. It's not that expensive either.

Ken