Well here is what works for me. I picked this sign up a while back as a good sign but only one side useable. It is the long Richfield and someone had taken great efforts to paint GARAGE on the backside. I got it pretty cheap because only one side was good according to the seller. Here is what I did. I have included pictures.Here is all you have to do.

Lay sign out and apply aviation paint stripper with an old throw away brush.

Let it sit and watch it bubble up and crinkle.About 10 to 30 minutes does it. Then scrap it off. I haven't found too much that can hurt the porcelain. Rinse it off with water and dry.

Then I sometimes use a light cut rubbing compound by 3M and remove any stains or imperfections. A heavy cut can be used for stubborn marks. Then I follow up with a good liquid polish. There you have it, and the side shown is the end product. It turned out better than the original good side. Have fun. Ted

Ted, thanks for the info & pictures. That had to be like a little kid opening a present on christmas morning. Nice job!!

Great job Ted! Another useful tip for the "do it yourselfer"!!

Outstanding Ted..Me likes , Me Likes
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Hubba

Thanks Tom and Hubba. Not bad for one of us knucle draggers. Ted

HEY IS THAT SIGN FOR SALE. CHEESE

Okay Cheese just cause it's yellow you want it. Ha Ha. Not for sale cause I hung it 16 feet in the air. I had been looking for one of these for a long time. I'll find you another painted over one. Yeah right like that will happen again. Ted

Jeff,
I'm not sure anything compares the "high quality" waxes and polishes you have on hand at any given time.

ted: just saw your richfield sign cleanup. nice. I'm just 100 klicks south of you, does anyone in this area restore porcelain signs?? please advise, thanks, gary