Rust on siding

[PACKORACKDAD]

Did a house wash, but I can't get the rust off the siding. It's overflow from an air conditioner condensation unit. I've tried bleach, simple cherry with tsp, and some stuff from HD called rust out (?). Nothing's worked so far, any ideas?

Thanks
scott

 

[Russ Johnson]

If oxalic won't get it, aluminum brightener probably will.

 

[Larry Millette]

Did a house wash, but I can't get the rust off the siding. It's overflow from an air conditioner condensation unit. I've tried bleach, simple cherry with tsp, and some stuff from HD called rust out (?). Nothing's worked so far, any ideas?

Thanks
scott

Scott, "Super Iron Out" from HD or Lowes. Comes in a 1lb or a 5lb. Mix aprox 1cup powder to 1 gal of water mix well and spray it on. BYE BYE Rust!
http://www.summitbrands.com/brands/IronOut.aspx