I am sure we all posted answers to this question some time ago. Whatever.
A white powder comes off? I think that is the rust of aluminum. Much more attractive then normal iron rust. Of course some of our modern buildings are erected and allowed to rust, very interesting effect. I understand this is very popular in Pittsburg. There is one very attractive building on Wilshire Blvd and Highland in Los Angeles, it has indeed rusted to a most attractive ruset brown. Go Figure.
For Aluminum I use an acidy spray from a container attached to a hose of at least 60 PSI. I spray away and have two of my highly unskilled workers brush it all off and then second time around we wipe it all off. Then it sits shinning in the sunlight until wind and sun have dried the surface. Then with an additional additive added to the paint. I use an Airless Grayco rig and paint away. Tis done the battle won. And all of this was fun. God I hope the tenant likes PINK!
Yes, Yes, just about the same color as the little house just to the left of this copy.
Cheeers Lucius 8-) 8-) [ Edited by Lufos on Date 03/27/2004 ]
Sounds like paint dusting and not rust.
Spray with bleach and water 1 part bleach 2 part water, then pressure wash. Pressure washing will remove most of the dusting paint and sometimes will go down to bare metal. Then just use the best grade latex paint you like. Of course let it dry good first.
If the color is acceptable after pressure washing you might want to simply spray on Everbrite. It's a clearcoat that will make it shine like new and it will also help prevent further oxidation. It's expensive stuff but a little goes a long way. You can get it in smaller containers, but I think a gallon is supposed to do something like 6000 sq/ft. The nice thing is that you don't even have to tape or worry about overspray. I think their website is www.everbrite.com. They say it works well on aluminum siding and I suppose it does although we bought it for our popup camper.
When your aluminum siding gets to the point of chalking it means the factory finish is eroding away due to weather and sun.
Aluminum siding is prone to molding and milduing also, so if you want to do it like a pro:
1) Spray the entire surface with some bleach and water.
2) Power wash.
3) Let dry.
4) IMPORTANT: Power wash second time. All Chalking must be removed or paint will end up blistering off.
5) IMPORTANT: If you get down to any bare metal you must prime those spots. Latex paint will have a reaction to the aluminum due to the amonia content of the paint and bubble later.
6) Do not prime the entire house. Use 100% latex paint, which doesn't need any primer to bond to aluminum.
I am sure we all posted answers to this question some time ago. Whatever.
A white powder comes off? I think that is the rust of aluminum. Much more attractive then normal iron rust. Of course some of our modern buildings are erected and allowed to rust, very interesting effect. I understand this is very popular in Pittsburg. There is one very attractive building on Wilshire Blvd and Highland in Los Angeles, it has indeed rusted to a most attractive ruset brown. Go Figure.
For Aluminum I use an acidy spray from a container attached to a hose of at least 60 PSI. I spray away and have two of my highly unskilled workers brush it all off and then second time around we wipe it all off. Then it sits shinning in the sunlight until wind and sun have dried the surface. Then with an additional additive added to the paint. I use an Airless Grayco rig and paint away. Tis done the battle won. And all of this was fun. God I hope the tenant likes PINK!
Yes, Yes, just about the same color as the little house just to the left of this copy.
Cheeers Lucius 8-) 8-) [ Edited by Lufos on Date 03/27/2004 ]
Lufus
What is the acidy spray and what is the additive to the paint. As far as the tenant liking pink I'm sure you talked them into loving it.
Thanks
Ed
Sounds like paint dusting and not rust.
Spray with bleach and water 1 part bleach 2 part water, then pressure wash. Pressure washing will remove most of the dusting paint and sometimes will go down to bare metal. Then just use the best grade latex paint you like. Of course let it dry good first.
If the color is acceptable after pressure washing you might want to simply spray on Everbrite. It's a clearcoat that will make it shine like new and it will also help prevent further oxidation. It's expensive stuff but a little goes a long way. You can get it in smaller containers, but I think a gallon is supposed to do something like 6000 sq/ft. The nice thing is that you don't even have to tape or worry about overspray. I think their website is www.everbrite.com. They say it works well on aluminum siding and I suppose it does although we bought it for our popup camper.
When your aluminum siding gets to the point of chalking it means the factory finish is eroding away due to weather and sun.
Aluminum siding is prone to molding and milduing also, so if you want to do it like a pro:
1) Spray the entire surface with some bleach and water.
2) Power wash.
3) Let dry.
4) IMPORTANT: Power wash second time. All Chalking must be removed or paint will end up blistering off.
5) IMPORTANT: If you get down to any bare metal you must prime those spots. Latex paint will have a reaction to the aluminum due to the amonia content of the paint and bubble later.
6) Do not prime the entire house. Use 100% latex paint, which doesn't need any primer to bond to aluminum.