I use CLEARBAGS for my unframed works. There is only a problem with moisture on the ones displayed on the outside of my show tent. I do not have any problems with framed pieces. I only use 2 coats of spray on clear coat for finishes.

The Clear bags have beena  life saver as far as breakage and display. You can buy them cheap at www.clearbags.com

I purchase the ones with a top hanger hole and just display on a grid wall with long hooks to hang a dozen or so on ach hook. I can't tell you how much easier this makes displaying and storing.I bring over 200 to each show and only about 25 are framed work. I matt all my work so I have  portraits matted up to 8x10,11x14 & 16x20.

Oh yeah one more thing. Moisture only builds up in the bags if the front of my tent is facing south.

Deb