looks like a pressure washer with grit added wink might do as well with a pressure washer and the soap attachment filled with phosphoric acid .... or with a $100 soda blaster

Bill


Moved over to the Passing Lane

"When we tug a single thing in nature, we find it attached to the rest of the world" ~ John Muir
"When we tug a single thing on an old truck, we find it falls off" ~ me
Some TF series details & TF heater pics