I'm getting ready to stain and varnish my new windows.

I want to take the sashes out and do them laying down.

Problem I'm having is how to mask the panes so I don't get any stain or varnish on the glass.

Thought about Frog Tape but it gives me a headache thinking of all the tape to put on perfectly.

I'm using a gel stain and waterborne varnish.

Any advice would be appreciated.