Is it safe to use shoe polish machines for good shoes?

I only use them to touch up minor scuffs or remove dirt and dust if I'm out and about and no alternatives are available. The don't "polish" shoes and should only be used as last resort.

Twotone

Yes.

yes they are fine

How many of these machines would one need? 5 of them, each dedicated to one color? (Black, Brown, Burgundy & Clear, Cordovan) or do you buy several buffing attachments for one machine? Can someone post a photo or link please. I would like to see this. I Google'd but saw only industrial machines. This is interesting.

No. It's the equivalent of using a public toothbrush.

This is a problem? Although I hate it when they use them to clean the urinals.

Yes, because polishing your shoes and brushing your teeth are the same things, and on the same level of equivalence.

THey are quite safe. I;ve never heard of anyone who has lost a leg using that machine.

becareful not to burn the leather

How about the 'Shoe Buffer' sponges? I find them in my hotels along with the sewing kit and toiletries. Any reason not to use these 'Shoe Buffer' sponges? What do they contain anyway?

Because they contain silicone! (Pass one on your hand and see how it feels) Carry a travel shoe kit - neutral paste and wax that can handle your shoes - part of the travel planning - a small brush and a shining-buffing rag! Simpler enough!