Used new rust product

[bart78]

used new rust product called Phosphoric etch and prep and worked awesome. Sprayed on the hood and let set over night.

[51 MERC-CT]

Not really new,it's been around for years.

[oldscout]

Where did you get it from? Is there a brand name? I just got a 50 F4, and could sure use something.

[bart78]

Phosphoric etch and prep. Home depot 15.00 a gallon. Used about 8 ounces on the hood. Let it sit over night and just washed it off next morning. Was real good and prime or spray some on a towl and wipe on so it won't flash rust. Used a dollar spray bottle from home depot.

[Rascal]

Originally Posted by bart78

Phosphoric etch and prep. Home depot 15.00 a gallon. Used about 8 ounces on the hood. Let it sit over night and just washed it off next morning. Was real good and prime or spray some on a towl and wipe on so it won't flash rust. Used a dollar spray bottle from home depot.

Hi, Just to add my 50c worth.
This stuff is great for cast iron exhaust manifolds & the like .soak them for a day or two in a heavier concentrate. Goes kind of black looking until you pressure blast off with water, Dry em fast with compressed air afterwards then coat with spray wd40 or similar , should Look like new cast iron afterwards.
Alloy parts should not be left too long as they will be eaten away to nothing.

[tiquer]

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Originally Posted by bart78

Phosphoric etch and prep. Home depot 15.00 a gallon. Used about 8 ounces on the hood. Let it sit over night and just washed it off next morning. Was real good and prime or spray some on a towl and wipe on so it won't flash rust. Used a dollar spray bottle from home depot.

Sounds good . Home depot. Was it it in the paint section I assume?

[Russ/40]

Keep in mind, the stuff needs to stay wet to work. For long periods of derusting you need to place some cloth on the area and keep it saturated.