Well, okay, it’s actually an amateur tip. There’s no way anyone’s ever going to pay me to use Sharpies. So here it is. How to clean Sharpie ink off your plastic sign:

 Cheap Bicycle Tire Glue         

Learning this was a happy accident. Kind of like penicillin. (Except for the miracle-drug-that-saved-millions-of-lives part. But other than that, it was like discovering penicillin.)

Here’s what happened. The glue was not thick and tacky, as one might expect from rubber cement. It was thin and watery. It came shooting out of the tube when I squeezed.  Glue everywhere! On the sign, on the tablecloth, you get the idea. I grabbed a towel to the wipe up the excess, and guess what? INK everywhere! This stuff dissolves Sharpie ink, and it doesn’t melt my plastic. This made me sooo happy. And it didn’t even take me all the long to peal off my patch, get to work erasing ink blotches, and finish erasing the existed smudges and all the resulting smudges from using the glue.

In case you can’t make it out from the picture, it’s “Rubber Glue” from “Bicycle Works”.

And the results, if I do say so myself, are pretty spectacular.  Notice how there’s no patch?