Safest rust remover and rubber

[Mr70]

And it will remove lightly painted paint,on very shiney surfaces.
I had four clean metal 1qt.oil cans,but with rusty tops.
I poured this stuff on their metal tops,and let em soak overnight.
In the AM,I had a few drips running down their sides.
The advertising paint under those drips was all eaten away.
I contacted the vendor,and he said if you read the instructions,it says will remove some paints from some clean surfaces too.
Best to do a test first,and maybe not let it soak as long as you think,but still a great product.