Painting exhaust/ventilation pipe

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ilyaz

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I have this pipe on my roof. I guess it's some sort of exhaust/ventilation pipe. As you can see it's (i) metal and (ii) rusty.

What I want to do is (i) remove the rust and (ii) paint it

Reasons for doing it is (i) aesthetics and (ii) I don't want the pipe to rust through and fall apart. Not sure whether it's likely in the next 5-10 year but since I live in a humid area I presume it might happen.

Questions:
1. What type of chemical should I use to remove the rust?
2. What type of paint should I use?

Thx!

IMG_3653.jpg
 

kok328

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That's galvanized sheet metal. I'd hit with a can of Rust-stop Spray paint.
 

oldognewtrick

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Get a can of Rustoleum Rusty Metal primmer and a can of top coat, just follow the directions on the spray can.
 

ilyaz

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Most Rust-Oleum products that I looked at said they were not supposed to be used on galvanized steel. I ended up buying a can of this.

Used the whole can and the result was a nice matte gray/metallic finish. I'd say problem solved, although I do want to check for any reappearing rust in a few months.
 
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