There is now an equivalent water base contact cement - 3M 30N - which can be rubbed off if it gets outside your logo. I don't know if it is available in hobby- sized quantity, but we use an approved version to stick aircraft fabric on airframes, and it apparently has no speed limit.
If all else fails, Callie Graphics can make new vinyl stick-ons for reasonable prices. I use her artwork on model trains and real airplanes.
I don't know what Johnson & Johnson calls it this week, but Future Floor Wax, applied with a Q-tip, before and after decal application, has been used on plastic airplane models now displayed in the Smithsonian. I use that technique on my models.
