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DENNIS
Platinum Nomad
Posts: 29510
Registered: 9-2-2006
Location: Punta Banda
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Quote: Originally posted by AKgringo  | | One word of caution, phosphoric acid, or the products used to convert rust will etch concrete immediately. Protect your floor if you are working on a
slab. |
And....never but never clean your toilet with muriatic acid for the same reason. It'll be like lining the bowl with sandpaper.
"YOU CAN'T LITTER ALUMINUM"
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rts551
Elite Nomad
Posts: 6699
Registered: 9-5-2003
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From experience. If your metal is thick you can cover the rust. If it is sheet metal do like Bob ANd Susan say. Cut it out...otherwise it just
comes back from the back side or creeps sideways.
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surabi
Ultra Nomad
Posts: 3138
Registered: 5-6-2016
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[rquote] And....never but never clean your toilet with muriatic acid for the same reason. It'll be like lining the bowl with sandpaper.
[/rquote]
Well, I use muriatic acid to remove mineral deposits in my toilet evry few months and I haven't had that problem.
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Alm
Ultra Nomad
Posts: 2716
Registered: 5-10-2011
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| Quote: Originally posted by rts551 | | From experience. If your metal is thick you can cover the rust. If it is sheet metal do like Bob ANd Susan say. Cut it out...otherwise it just
comes back from the back side or creeps sideways. |
So Bob was right again. You can't replace a rusted out chunk of metal with a coat of paint. Duh  ...
How does this miracle paint compare to Rust-Oleum that costs 3 times less?
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del mar
Banned
Posts: 1057
Registered: 7-23-2016
Location: the cantina of course
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Mood: lil' fuzzy
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| Quote: Originally posted by Alm | | Quote: Originally posted by rts551 | | From experience. If your metal is thick you can cover the rust. If it is sheet metal do like Bob ANd Susan say. Cut it out...otherwise it just
comes back from the back side or creeps sideways. |
So Bob was right again. You can't replace a rusted out chunk of metal with a coat of paint. Duh ...
How does this miracle paint compare to Rust-Oleum that costs 3 times less? |
it doesn't and yes its a miracle paint and I was just hoping for a source here in baja norte. 
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pacsur
Nomad
Posts: 191
Registered: 8-28-2003
Location: San Jose del Cabo,BCS
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Having a finishing business I deal with all types of rust, rust does not always start on the surface as it can come from inside also, cast patio
furniture for example is usually made using whatever they can find and melt down, old transmissions, aluminum cans, or any scrap metal they can find,
the white powder on your patio furniture is white oxide, or rust.
Ferrous metals that are thick enough can be sandblasted and should remove all the surface rust, but unless you seal the metal from the air(or
chemically treat) it will return right away, multiple coats of paint can stop or delay any further oxidation, powder coating is much thicker than
paint and that's why it seals and protects so well, although weld locations will usually start rusting first, most welds spots have microscopic pores
and powder will bridge over the pores and not seal as a liquid paint would, so when there is enough moisture in those little holes oxidation starts
and then creates little bubbles as it expands.
Everything I've read concerning por15 has been positive, it seals your rusty metal and is very strong, and yes you do need a topcoat if it will be
exposed to UV, it's usually used for car frames and floorboards.
There are not many solutions for light gauge sheet metals, but there is a big difference between say 14ga and 16ga, 14ga will last significantly
longer than anything lighter.
Also minimal maintence will extend the finish life on most items, mainly just washing or wiping down with fresh water to remove salts that build up
from our ocean breezes.
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Terry28
Senior Nomad
Posts: 824
Registered: 8-25-2007
Location: S.Calif mtns.
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Mood: Thirsty
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Rust never sleeps......
Mexico!! Where two can live as cheaply as one.....but it costs twice as much.....
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