@Rockhead,
Heck yeah that might work!
We don't do any serious stripping, chosing to take it to the pros instead but we have had doors dipped and stripped without the glass being damaged.
I suppose I could just try wetting a towel with the stipper and rubbing the doorknob so I wouldn't have a tub of it laying around anywhere.
I've been worried about trying anything and mucking up the doorknobs. I've looked at replacements and I simply can't afford it.