It's probably been discussed, but I can't find the thread. I'm looking for advice on promoting rust on mild steel to make new steel more closely match rusted steel. One of my sculptures uses weathered (well rusted) salvaged steel for most of it, and a few pieces of new 11GA mild steel scrap.

Hello, I recently went to look at a stainless steel wall fountain I had installed about 1-1/2 to 2 years ago and noticed light rusting around drip marks on the outside frame. The face of the fountain, which is constantly covered by running water, has no rust at all.