You could probably get by with a 1K (one part) clear, but the spraymax 2K will definitely be durable. You might want to practice on a few junk parts first if you don’t have a lot of experience. It will take more work to remove blemishes or orange peel once cured. You should wear a respirator when spraying that kind of clear. Make sure you clean the keys very well. Soap and water should work and a mild solvent (test first) like isopropyl alcohol or wax and grease remover. You’ll know they’re clean when water “sheets out” over the surface.

Nah man.... Should be ok. You are talking to a nurse and lung health is quite important. It would be like $5 extra, that's nothing. Here is what I would send you.

https://www.amazon.com/gp/product/B00079FOK0/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&psc=1

Been very happy with it.

ps - plus I could just use amazon.ca