Krylon Triple-thick crystal Clear Glaze/0500 Is what I use. one coat is like putting three coats on it, I always spray three coats ot on the projects I do. you can find it at Wal-mark.
*Bright glass-like coating
*Superior High-gloss finish
well done on your first intarsia project, I have the same pattern and it did come with a VHS tape called Intarsia made easy. I ordered it from SCROLLER ltd. and the person name is Dale in the video tape that was making the Chunky Chipmunk.