Nails in certain wood

snip from backyard boat builders

" Galvanized siding nails are good replacements for original, rusted
siding nails if the siding is pine or Douglas. However, the zinc in
galvanized nails reacts chemically with cedar and redwood. Nail
manufacturers recommend that you go with aluminum or stainless steel
fasteners when you're using either of these woods -- and whenever
you're using pressure-treated wood. (The preservatives incorporate
salts that react with the zinc.) "

Good to know! I may go entirely stainless for nails and screws anyway,
to avoid issues like this entirely.

thanks "timothyennuinet