these things finally came down enough in price for me to consider it
it comes with a bunch of cartridges
first to try
starting here
okay, not terrible - maybe 3 minutes
with the black paint stripper... maybe 7 minutes
then 80 grit DA
certainly faster then just 80 grit ... the other two cartridges would work well for graining metal
oh and the other boxes were 2 Optima yellow tops for the Blazer
time to make a huge mess.... but at least not worry about the cross bar rusting out from the inside again
had to modify the hose to fit a epoxy nozzle..... it worked, ish