I use Vasoline to...

[Wild Cobra]

Smearing yard signs with Vaseline to protect against vandalism: N.C., Va. share swing-state stories

this article is a hoot, but at the same time makes sense. One selected paragraph:

I've learned that a way to reduce that vandalism is to line the edges of the sign with Vaseline, making its destruction a gooey, messy proposition. Sometimes vandals stop in mid-destruction, and I come home in the evening to a sign someone started to destroy but then stopped because their hands became a mess.

[Drachen]

.... Check the temperature of your basement! Did I win?

Seriously though, I can't quite get a visual for how this is to work unless the "vandalism" is just pulling it up out of the yard and laying it back down. If I were an actual vandal,I wouldn't care about on the outside, I would be using my permanent market on the inside.

[DMX7]

You'll need plenty of it on November 6th.

[mouse]

Vaseline has the opposite effect in trying to keep fellow inmates from vandalizing that ass.