Prints made with filed out carrier....

How are these prints usually framed? The only way I've seen so far is with no matting and glass directly touching the print. I really don't want to do it that way. I could use spacers but then if the print or print on mount board buckles even a little, it would touch the glass.

My usual method is float mounting with about 3/4" all the way around or mat cut so that it cleanly shows the image only. I don't think the former method would look good with dirty borders and the latter defeats the purpose of using filed carrier entirely.