Hmmm.. Dirt bike $$$$ Snow mobile $$$$
Hmm.. I doubt it would work out nowadays. Many businesses don't want to touch anything gun. Rightfully so. Legally they can't take possession of a firearm unless they are ffl.An alternative I haven't noticed is check with a small plating shop [antique repair, jewelry, etc.], they can usually 'de-plate' something. Years ago, I had it done to a project I was working on. Not terribly expensive.
Also, if you need to find out what is in a drain cleaner or such, get the MSDS off the web. That will usually describe the primary ingredients and how to handle.
Good luck.