Hello, I have a client right now whose very old toilet is missing the tank lid (this is a two part toilet, the type with the tank and bowl separated by a 6" pipe). Anyway, the fixture is very old, and the porcelain has taken on the crackled look of an old coffee cup -complete with darkened lines where the cracks are. The original tank lid is gone -hauled to the dump - and I've found a replacement that fits, but of course it isn't "aged" like the tank.

My question: assuming we have a good supply of lids of the same make/vintage to play with, would it be possible to re-fire them and attempt to crackle the existing glaze? Could glaze be added?

I was thinking of a raku type of process, if this is possible. Any thoughts? thanks!