Hi Steven
The book's not here yet,....maybe tomorrow!
The Piotti formula I had is very symilar to the one I got from Oscar..mercuric chloride, ferric chloride and other nasties, they apparently let the mixed batches of the stuff age,..the longer the better,use a sea sponge to apply it, the rustings are never more than 3-4 hours and they card by hand with fine steel wool, the finish has a high luster if one didn't know better it could pass for hot blue,...I've tried and have gotten close but not quite
The pictures are abit grainy but the Holland came ot better than the A&N
CJ
