Other than Mobil signs, cans, and pumps. I also collect Safticycles these were made in La Crosse Wisconsin in the 30's and 40's. Thanks to this site I met Ryan Underthun who has painted on for me and will most likely do more, (right Ryan). He did a great job. Here is a link to a photo of a 1948 Safticycle. Check it out.
http://webpages.charter.net/safticycle/ssingar.jpg

Other than that I also have a few Jeeps.