How'd you know, David:-))
Welcome aboard Spirit! We also have a Brewer 40 PH. Is your fuel tank SS, approx. 95 gal., located under the dinette (that's where ours is)? I've looked at the tanks and I believe they (and the water tanks) are designed to be removable with relatively (?) minor difficulties.
As far as the bottom goes, ours had been peeled and barrier coated by a previous owner so we haven't had any problems, but obviously he did.
I sent you a PM a bit ago after reading a reply you made on another thread.
I've done a pretty major refit on our boat and have learned a lot about it so if you have questions I'll try to answer them if I can.
SV Laurie Anne
1988 Brewer 40 Pilothouse