I used Harpic bleach to get rid of the worst of the rust and then trial and error. Using green polishing paste and mop on an angle grinder did a good job finishing with Autosol on a medium foam polishing head fitted to the drill to get it really shining. Finished off with a towel and Autosol to get all the way around the pipes. Still not 100%, but considering what it looked like you’d not think it would ever shine again!
I used Harpic bleach to get rid of the worst of the rust and then trial and error. Using green polishing paste and mop on an angle grinder did a good job finishing with Autosol on a medium foam polishing head fitted to the drill to get it really shining. Finished off with a towel and Autosol to get all the way around the pipes. Still not 100%, but considering what it looked like you’d not think it would ever shine again!