I started with bandit signs, letters and car magnets.

Lockheed Martin, Alliance Airport, BNSF) are consistent magnets.

Also, if anyone knows of a place for those little magnetic car signs.

And they leak.Don't know what bead blasting is, but a white screen sounds kind of weird and like a dirt magnet to me lol.  

Make sure your tenants understand their rights and obligations as stipulated on the contract.Each of my rental units has fridge magnets with the contact information of my plumber, pest control guy, and electrician on it for the tenants to contact directly.

My Business CardA design for a car magnet or a bandit sign.

After drinking a lot of wine one night with a roommate, we began discussing the colors things turn in the fridge after they go bad, and thought a fridge magnet would be a great seller. 

They're just dirt magnets and one more thing to fix. 

I have nothing on the subject, but there is a related subject I've been curious about...When you order checks, the banks sell you all the security features of the check: magnetic ink, watermark, lots of other BS.

I have been doing bandit signs, yellow letters, cold calling, CL advertising, car magnet advertising and word of mouth.