Yea, let us know what you find. I wonder what the effects are on rubber?
Does'nt sound like something I would do. I just keep my shoes clean w alcohol, that spray just sounds messy. Interesting though.
Hairspray seems like a decent idea, but i would imagine it wearing off after an hour or so after all the chalk and dirt gets on the bottom. Hairspray does get sticky andi think i may try it and see how it works. Ill report back!
personally i don't think its a good idea.. over time, climbing shoes can really loose its adhesive quality... adding some kind of oil i assume will not really help that much.. oh well, update us with the idea.. and thanks!