1. Well it partly depends on HOW you paint.
Stainless Steel needs Oxygen to repair its Chromium Oxide Passive Film which prevents corrosion. So not painting Stainless Steel is best. Not painting
gives good exposure to Oxygen to repair itself if any salt or contaminants get on it - so long as the Stainless is maintained (washed every so often, if
used externally) and of a suitable Stainless grade and finish. So for fittings and fasteners on the exterior of houses near the coast this would mean
Stainless Steel grade 316 and ideally polished (ouch to the eyes!).
Painting and sealing Stainless Steel is fine and o.k but this would mean a paint 'system' which includes a etch primer and Epoxy paint, to ensure salt
and other corrosive agents don't get in. The risk you run with slapping some acrylic paint over the Stainless is that:
a) If it is for exterior use, the contaminants can get through the paint, it doesn't get any rain water or washing and the Stainless under the paint
underneath could rust and leach through
b) You get away with no rust or tea-staining but the stainless was not etched and the paint eventually can peel off
Although virtually any type of paint will bond to a properly prepared stainless-steel surface, a two-part epoxy paint is the preferred coating - here is a
great guide on how to paint Stainless Steel.
As far as using Stainless Steel Fasteners in timber construction goes, research shows that stainless steel corrodes less than other metals in wood and
that Stainless Steel is the preferred metal to use in Treated Timber. So Stainless Steel is a great metal of choice.
2. Painting Stainless Steel
Well it partly depends on HOW you paint.
Stainless Steel needs Oxygen to repair its Chromium
Oxide Passive Film which prevents corrosion. So not
painting Stainless Steel is best. Not painting gives
good exposure to Oxygen to repair itself if any salt or
contaminants get on it - so long as the Stainless is
maintained (washed every so often, if used externally)
and of a suitable Stainless grade and finish. So for
fittings and fasteners on the exterior of houses near
the coast this would mean Stainless Steel grade 316
and ideally polished (ouch to the eyes!).
3. Well it partly depends on HOW you paint.
Painting and sealing Stainless Steel is fine and o.k but
this would mean a paint 'system' which includes a etch
primer and Epoxy paint, to ensure salt and other
corrosive agents don't get in. The risk you run with
slapping some acrylic paint over the Stainless is that:
a) If it is for exterior use, the contaminants can get
through the paint, it doesn't get any rain water or
washing and the Stainless under the paint underneath
could rust and leach through
b) You get away with no rust or tea-staining but the
stainless was not etched and the paint eventually can
peel off
4. Well it partly depends on HOWyou
paint.
Although virtually any type of paint will
bond to a properly prepared stainless-steel
surface, a two-part epoxy paint is
the preferred coating - here is a great
guide on how to paint Stainless Steel.
5. As far as using Stainless Steel
Fasteners in timber construction
goes, research shows that stainless
steel corrodes less than other metals
in wood and that Stainless Steel is
the preferred metal to use in Treated
Timber. So Stainless Steel is a great
metal of choice.
http://www.anzor.com.au/blog/painting-stainless-steel/