"Well, then, how about white cotton gloves like conservators and such use?"
That would make you appear as or more nuttier.
"I sure wouldn't want some geek putting his greasy fingerprints all over an expensively painted model."
If you can't handle that, try using ebay then.
This is a dirty hobby.
We MRs root in the dirt and have been known carry back buckets of dirt so as to have just the right color soil to accurately model a specific location. We proudly drag home rusty hunks of metal that litter the ROW of the local railroad whenever we find them. We collect bushel baskets of plant snippets to turn into trees for our layout. We toss around ground foam and other scenery materials with abandon. We mix up plaster and slop it on to our layouts. We splatter our models with paint to make them look old. We build our layouts in dusty dirt basements.
Anyone who worried about a few fingerprints is in the wrong hobby.