Dissolving Bondo Spot & Glaze

Short of the story is, I filled in some holes with Bondo Spot and Glaze (Testors Red Putty) and now I want them unfilled. Is there an easy way to dissolve the putty out of the holes?

Thanks.

Get it wet with water, and make the water soak in, then go at it with an exacto knife, picking it out of all the crevises