On a related note: when we go to the RV show, a lot of the tourism associations around here offer fridge magnets to promote their region -- "Come and see what we have to offer!" type of thing. So I use them as bumper stickers, and they stick right to the steel rear bumper on our Jayco. Haven't lost one yet.
Geoff & Jill
& Sierra, the little white monster
2013 Ford F-150 XTR SC Ecoboost
2015 Jayco Jay Flight 24FBS