what is a sandblaster in spanish?
a machine which is used to sandblaster rust or paint off metal objects.
From "http://www.spanishdict.com/translate/sandblast", it is only a verb: "limpiar con chorro de arena". This is literally "to clean with jet (spurt) of sand." So, to make it "cleaner", I would assume you could make it "limpiador con chorro de arena".
I hope this helps. :D