Hey now, I have a sign [porcelain]that has a few dings that have knocked the prcelain off exposing the metal. I see that porc. repair kits are easily available, would I harm the value of my signs by doing these repairs?? I realize this is very subjective, and I am still undecided,as they dings add a type of appeal.I also know in general you DO NOT fix/clean antiques.My signs are not anything rare or special, so we/re not talking big money, just wanted to know what is the general concensus...thanks, Leo cool