Put together a pressure washer sandblasting rig, ideas off youtube.. got a pot blaster from harbor freight,,, set to 40 psi,, used some screened playsand, used respirator while sifting. 3.5 0 degree nozzle 2.7 gal min 2800 psi,, did well, no clogging, and it stripped the small 12 footer inside and out with 4 bags of sand..