I had the bonneville undercoated a couple weeks ago as soon as it got back on the road. This stuff they are using these days is like a bee'* wax type substance. What can you use to take that stuff off without harming the paint.

Will suggested bug and tar remover wich would most likely work but is there anything else out there that can clean that stuff???

good old wd-40 usually works good. just make sure you put a coat of wax back on.

I second Will and suggest Bug and Tar Remover. Bug and Tar Remover is perfect for removing the overspray from that stuff (and a ton of other things) especially when it hasn't completely dried. I had a lot of overspray when I undercoated my wheel wells in the Fall (I actually did a lot on purpose to see how well it cleaned it off ) and well, it'* amazing stuff.

If the overspray is dried, it will still come off. B&T remover also removes any wax that was on the paint so a coat of wax afterwards is a good thing I always stock up on a couple bottles of this stuff in the spring. I couldn't live without it.