So my brother is restoring a '70s Triumph he bought in boxes.
The unknown PO had the frame sandblasted and painted, but there is still sand evident in the frame. This is an oil-in-frame bike with only slinger filtration so any residual sand is going to knocker the engine.
What's the best way to clean out this frame and get rid of the sand? Shop vac? Flush with kerosene some how? Something better?
thanks