Nice idea there with the float! I never thought of that! Hmmm...I shall have to one day try that one.
I suppose it's a throwback from the fact that I paint, but I just can not feel at ease framing my scratchboard work without glass. I fear that it will get scratched/scuffed/dirty, so I stick it behind glass. Here is an example I did about a year ago. The glass I used is museum glass, which is expensive, but has a neutral color tone (no greenish tint) and is pretty glare resistant, with only mild blue glare here and there.
It's a bit hard to see, but the top mat is a lovely textured mat that looks as if it is made of flakes of graphite, it has that same kind of sheen. The bottom mat is suede in a cherry red, to match the cherry wood frame. I like using a pinch of color to help 'brighten up' my SB work. I can't wait to get stuff framed again at the end of the year.