Vintage Coke Sign

[cola62]

I just purchased a vintage 4ft porcelain Coke sign to hang on my shed.  I hate to put it outside but that is why I bought it.  I mounted an old fashion gas station light over the location to light it up. My question is what would be the best way to protect it.  I was thinking auto wax to repel the rain.  Any thoughts?

[Creighton]

The boys over on oldgas are fond of "feed and wax". Never have been able to find it in WA.
I just use turtle wax.
If it is not in direct sunlight or rain may not need anything.
Clear coat or varnish cause problems later and do nothing for the sign.
Creighton