Inquiry (采购产品): useing acid to reduce rust Hi, In the course of time I spent as a welder I noted that a manufacturer of steel trailers used to brush an acid on rusty metal. When that dried, the rust was simply brushed off - then the metal could be painted. I'm not sure what kind of acid that would be. can you clue me in? I thought it may have been called olic acid but I'm not sure can sulfriac or hydricloric acid be used in the same way? Looking for a solution, James E. Jarrell jejarrell@gmail.com Thank you. **** Hidden Message ***** James Jarrell 1191 Hwy 64 West Asheboro, NC 27205 USA Company: Thomas Tire Co. Title: Handy Man E-mail: jejarrell@gmail.com **** Hidden Message ***** jejarrell@gmail.com