RLARG said:Paint thinner comes in different forms ie:naptha,mineral spirits,xylene and mixture of all some of which will leave residuals.
Drain cleaners are usually lye or hydrochloric acid both of which can make a reaction go totally in another direction. Griniard reaction??
You mean Grignard? No way.
Concnetrated H2SO4 is available at the hardware store as an industrial strength drain cleaner...