Painting exhaust/ventilation pipe
#1
05-22-15, 05:09 PM
Painting exhaust/ventilation pipe
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!
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!
#2
05-22-15, 07:24 PM
Super Moderator
You could use a "rust converter", several different brands.
If it were mine, I would sand it all over, use the rust converter or a rusty metal primer per directions, then paint with a "hammered finish" enamel spray paint. You could use any color paint, just watch out for over spray on the roof.
If it were mine, I would sand it all over, use the rust converter or a rusty metal primer per directions, then paint with a "hammered finish" enamel spray paint. You could use any color paint, just watch out for over spray on the roof.
#3
05-23-15, 03:41 AM
I'd sand it the best I could, apply a rust inhibitive primer and then paint it a color that matches/compliments the roof. If you prefer to use a latex top coat you need to make sure it's well coated with the primer! 2 coats of primer wouldn't hurt if the top coat is latex. I've always brush painted the stacks - no worry about overspray.
#4
06-06-15, 08:51 PM
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.
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.
#5
06-07-15, 03:33 AM
Generally when a coating states not to use it on galvanized metal they are referring to new galvanized. Once the galvanized has seen some weather it will take paint like most any other metal.
Did you sand off the majority of the rust?
Did you sand off the majority of the rust?
