Removing paint from threads

I got a spoiler today for my Tercel. It's brand new, and I won it on eBay. It's a nice spoiler that was primed but not painted. The problem is, when it was primed, the holes that the bolts go into weren't covered and the primer is in the threads. This is keeping the bolts from going in. What's an easy way to get this paint out of the threads?

Run a tap through them