Sewnoma

It's a paint made by PLAID (same folks who make Mod Podge) that's designed specifically for this purpose - it's all removable so when I move or get tired of the pattern (or screw it up really bad) I should be able to just peel it all right off!

I think the paint is called "Gallery Glass". The faux leading is same brand/manufacturer - it comes in strips that have sticky backs and you just stick 'em on and trim with an Exacto blade. Fortunately it's repositionable too, I had to move a few lines after I stood back and realized I was making it wonky! Then you take "liquid leading" (also same brand) and dab it into the joints to hide all the little gaps.