In the late 60s I was working at Flannery Ford and it was hot all summer so rear ,side ,and front bays where opened and we prepped cars before they entered the spray booth out in the shop every few days or weeks the paint was going crazy on the cars for 2 months no one could figure it out! And low and behold a guy came in with a chemical truck for work and when we delivered it it was right down the street on the other side of the block (No EPA regs. back then), They were venting their building into the open air!!!
When the wind blew the right direction it contaminated everything! We closed the doors and no more problem! one of their products was silicone and others were acids and p.c.b. grease and wax remover just helped spread it on the cars it wouldn't clean it
Off subject but I was reading some old pocket hot rod mags and remembered my past youth and thought I'd post it!