I have vintage lawyers bookcases with glass doors. They are in their original condition (stained and some sort of protection I assume over the stain) and I have stored fabrics in them for years and have never had any problems whatsoever with staining or discoloration. Many members won't agree with this and it's fine we all have our own opinions. I will tell you I have many antique and vintage items that have held many fabrics for over 20+ years without any problems.