you can do that too. though i'd experiment on a different canvas. maybe a transparent glaze, laid thick, press fabric into that, then peel off slowly. though it wouldn't be in your style, could you use an oil based clear coat, and place a silky like see through material and just like leave it there? give it a 3-d look, though hard to scan in later.
on the same note, using a transparent base, maybe you can just roll it on with a small nappy paint roller.
---Mike Savad
MikeSavad.com