I picked this sign up a while back and finally got around to cleaning it. I tried all the recommended products but nothing would touch the contamination on its finish. As a last resort I applied muriatic acid for about 15 to 20 seconds and rinsed/dried and repeated as necessary and that did the trick. As you can see, the red had a lot of fading so about an hour of "stand on it" buffing (someone on here suggested that), it looks much better. This was by far the toughest one I have had to clean so far.
When using muriatic acid, do you need to dilute it with water? 10-1 or something? When youre finished do you have to neutralize the piece with baking soda or anything, or just rinse with water? I have a couple signs i would like to try it on this weekend. thanks
Registered: Sun Jun 19 2011
Loc: Oklahoma (BOOMER SOONER)
I have done this many times with Muriatic acid and it works great. All I do is wash it off with a water hose and it breaks the acid down and then just wipe it down it with a dry towel. Then put a coat of wax on it because it will rust again if left exposed, just a hint dont put the acid on in direct sunlight because it seems to burn the finish a bit
Registered: Wed Oct 25 2000
Loc: Santa Paula, Calif
Originally Posted By: SC62
Where can you buy Muriatic acid?
Anywhere you can get Pool & Hot Tub Chemicals. To neutralize, use Baking Soda mixed in water, before pouring down the drain. Use any ACID in a WELL VENTILATED AREA & ALWAYS wear EYE & SKIN PROTECTION. Keep containers of ACID covered, fumes will enhance Rust.