My 2c on solvents
I saw questions on earlier posts concerning rust removal, bolt cleaning, etc, and wanted to share. cigarette lighter fluid (before butane) is Naptha. It is available in small quantities (zippo, etc.) but more economical to buy a quart can at an auto supply store. It is a good grease remover, and when it dries, it does not leave any signifigant residue. It will not remove rust.
charcoal lighter is kerosene. it can be purchased more economically by the gallon at anyplace that sells deisel fuel (almost the same). It is an excellent rust remover especially when combined with a light 0000 steel wool rub.
two words of caution
keep you scope lens covers on when using any chemicals, as lens coatings are vulnerable to most of this stuff. use them when stroking your bore with solvent, especially when using a brush which causes the solvent to mist.
Kerosene, and anything that contains it (like wd-40) will remove bluing.(remember bluing is rust)
sorry if this is old news to anyone, I read these questions from posts submitted in 2007 and 2009