RUST/MOLD on WALL/CEILING

[artnews300]

RUST/MOLD on Ceiling/Wall?

Hi
I leave in a loft. The place is made with Metal polls and bricks. Since the windows are so big right above them is part of the metal frame structure of the building covered with bricks which are painted white. When it rains aside of the fact that you can see every now and than watter drops something really strange happens. The wall get all this little yellow bumps which are basically a yellow.white sand piled on each other. It feels like some sort of corrosion of the metal that goes through the paint and adds up on itself. Any ideas how to fight that or at least spray or paint something on top of it?

Thank you

Here are some Pics:
http://i17.tinypic.com/71hncjd.jpg
http://i5.tinypic.com/6s6zn2t.jpg
http://i19.tinypic.com/8fv6q07.jpg

[HayZee518]

try a product called thoroseal. its a portland cement based waterproofing paint. this may help you by sealing out migrating moisture.