Refinishing is finally done and it's now back at home.
I was trying to find out the factory colour code, Maserati Classiche didn't have any data, but Carrozzeria Campna told it's Maserati Mat Grey no.502, but then neither PPG nor Maserati couldn't find anything with this name, so we had to find something as close as possible.
Seam sealant was also applied in the same brushed style.
There are some blemishes here and there because not everything was cleaned perfectly, but most of those places won't be visible because they are behind the insulation, or similar.
Talking about firewall insulation, I'm still undecided whether I should get the same tailored made part (it's said it's still available from the factory), or use something aftermarket, with better heat insulation properties which the original lacks, and it's also not really waterproof. My only concern is that most of these are aluminium sheets on the outer layer and not black like the original.
While there the hood insulation was also removed, it was falling apart on every touch, and underneath was also repainted. I'll glue on a new one later.