Originally Posted by Alex2005  I laid the steel in the solution and it does bubble away so to speak, but it seems to take longer than 5-10 minutes. |
It depends on a number of things, how thick the scale is. It's composition and defects. If it is too slow, you can heat the solution. Increasing the acid concentration won't speed it up much. Heat is appropriate catalyst.
Unfortunately, what you see is what you get. I don't know of any chemical solution that will improve surface finish.