I've been removing rust from our steel deck furniture with my angle
grinder and have discovered that some of the steel is pitted in the
most rusty areas. Of course, there's rust in the pits that the
sanding wheel isn't reaching. Must I get all of the rust out of those
pits (with wire brushes, etc) before I prime and paint the surface, or
will the primer sufficiently fill and cover those spots to hold the
rust at bay?
You need to try to get it our because it is likely to cause your paint
to life and bubble over time.
I don't know where you are in the process or how many pieces you have
to clean up. But have you considered having them commercially sand-
blasted. A few years ago I had three of the old metal "resort" lawn
chairs that needed to be redone. I did some repair welding on one and
took all three, in pieces, to a sandblaster who did all of them for
about $15. I have also had bicycle frames blasted for as little as
$7. In both cases I was willing to drop the parts off and let them
work them in with other flow.
Shop around because the price varies greatly. The blasted surface
provides a good paintable surface.
You might want to try a powder coating business as I dont think their
are too many places around that just do sand blasting. I was able to
get mine done pretty cheap by waiting until he had an oven full. The
guy did mostly industrial stuff and would let his teenage son take
care of little projects like mine on the side for spending money. The
kid must have done all right. He had a V8 'stang.
I'd also wonder about the wisdom of using an angle
grinder to prep steel chairs for painting? I would
think a wire wheel or similar that is far less aggressive
and also capable of following the shape, getting into
more recesses, etc would be the way to go.
Agree that sandblasting could be a good choice.
shops that do car restorations and painting usually have sand blasting
i have one, but use it on glass. there might be some glass artists or
places that do glass blasting (for things like shower or front entry
doors, tables, etc) around that would have one.
Thanks to all for the timely and very helpful responses. I'll
definitely explore the sandblasting option -- the grinding isn't easy,
and it's a fairly labor-intensive process.
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