I just remembered what I did to get the yellow off of my pink machine. A big no-no. I went all out cleaning that machine, I used a lot of rubbing alcohol on the innards before I oiled it up and ran it, and I also used the alcohol on a Qtip cleaning the yellow crud on the outside. Most of it came right off so must not have soaked into the paint. Luckily I did no damage to the machine. I wiped it off right behind the Qtip, didn't let it sit there at all.
Cari