The only problem is that acid removes metal, this stuff pulls out the rust without cutting any metal. Here are some better pictures of before and after of my parts. check out the first picture, I dipped about an inch to see the difference, check out how thick the rust was. Look at all the stamping marks, metal curls, and the rubber parts, acid would have destroyed the rubber and erased all the fine detail. The stuff also has some detergent qualities too, look at the rubber, it looks almost new, and now you can see the part number on the snubber.dgc333 said