I found the fairing not all that difficult on the transom, oh it was a PITA but nowhere like removing the wood, however with the epoxy fairing I used it sanded easily. Plus....and here's the big one....when you put the engine, dive ladder, trim tabs, etc. back on they will hide any really bad imperfections.
After the Signature paint finish was completed I have to point out what I consider imperfections to people.