Have just purchased a 68 conv and noticed extensive rust inside the sub frame where the body mount is located just below the front seats. Wondering if there is a way to clean the rust out of the inside of the sub frame. Sandblasting does not sound like a logical solution; are there people that specialize in this type of restoration?

I know it's a dumb question but everyone has to understand that I am completely anal-retentive and will settle for nothing less than perfection.