RE: Wall primer that makes wall magnetic
The March 2002 Consumer Reports (our bible of sorts) has a short article on the magnetic paint on page 8. They reviewed 3 different brands. Bottom line is that it works, but you have to apply several coats (2-3 or more) in order to get enough "power" to hold more than light, flexible magnets. The article says the paints are child-safe when dry. And that if you only want to use it on certain areas, multiple layers of this stuff "can take on texture and stand out. Multiple coats . . . started to resemble stucco".
In the interest of avoiding nasty e-mails or a lawsuit or something, I'm not retyping the entire article. You might want to check out the magazine at the library if you don't already receive the magazine.
Hope this helps.
Mom to Alex (2002) and Catherine (2003)
"The challenge of parenting isn't shaping your kids to be what you want, it's shaping yourself to be what your kids need." - Wellyes