Dust

I use silks. Very old now. Silk won’t hold dust and it won’t scratch because of it. My wife can stitch a cover in 45 minutes. I can cut a drape in 5 minutes. Silk does not fray, it is water resistant and can stand a pretty good amount of heat.. I have silk surrounds that are over 75 years old. Covers over 50 years old.. Change the covers for the seasons..
They will last forever if you just soak them in Woolite in a 5 gallon bucket and rinse.

Mine still look brand new.. folks come over for a concert, I uncover and polish all the gear up in 5 minutes with micro fiber towels. Everything stays waxed and chrome is protected with Never Dul

It can be dusty, it just can't get humid. That is a killer for rust.. AZ is hot but dry.. Here we have due in the spring and fall. But set STUFF a barn around here it will never rust because the humidity stays low enough.. No salt on the roads. The sun is a killer though, AZ knows that.

Ruins everything, BUT can't live without it.. we hit 115 or 17 here last year.. BUT the over all year was cooler. Gets hot here, too.

Silks are very mold resistant to, I forgot that.. They can wick very well and still stay pretty mold and spore resilient. The spores don't stick as easy..