On Wed, 4 Apr 2018 09:30:26 -0700, Electric Comet
wrote:

On Tue, 3 Apr 2018 15:03:31 wrote:

black {iron} oxide
Yes as long as you don't mind rust

i did not use these


Just use bronze - not brass - or stainless steel. Galvanized is OK
too but hot dipped galvanized fasteners have become scarce.

i have some screws that look galvanized not sure if they are hot dipped

ended up using what look like powder coated screws
some green some gray

a few stainless or what looked like stainless

FWIW, galvanized is getting hard to come by. Galvanizing doesn't work
and play well with "environmentally-friendly" pressure treat so they
have gone to other coatings.