Do you cut the holes and stuff in the box before or after you spray it with a clear coat??
In my very limited experience I cut first and finish last other than attaching neck and hardware, but others might know better.
No surprise you're ahead of me on this one Diane. I found mention of it on some decoupage art forum when looking for no-smear solutions but haven't tried it myself. Come to think of it, they were using it as a sealer before using white glue or similar to glue the paper down and not before a nice finish like we're after. Oops.