I broke down and took a chance on the illustrious "China Freight" Sand Blaster unit...150 bucks I think....and aluminum oxide media. My old air compressor was long overdue being replaced, so fortunately, a friend of mine was selling his 2-stage 5 horse, 80 gallon tank...$400!
The blaster did the job BUT, it was a bit of a chore keeping it dialed in for proper flow.