Decoupage baby clothing for keepsakes.?

Question:Does anybody know if I were to decoupage an item of my son's clothing as a keepsake and put it in a shadow box on the wall, if it would hold up well? The clothing would be completely covered in the decoupage glue and sealent so that it were like a tiny plastic shirt, ya know what I mean? (Then placed in the frame)
Would it yellow over time, if in regular household conditions, or have other complications?
Thanks for any input!

Answers:
That is an awesome idea!I have never done it with a shirt but have used many types of fabric in the past.It will not yellow over time and there won't be any issues as long as no one touches it/because it will have hardened and could crack otherwise.Good Luck;)