after reading this thread i was thinking of getting a used percolator next time i'm at the thrift store, but after getting an ultrasonic cleaner on amazon for about $80 and using it on high heat with evaporust i think i won't need the percolator anymore i tried it out on a fuel pump and i like how it worked, first pass was the whole unit so that i could pull it apart easier, then i did all the individual bits, some needed 2 cycles at 20 minutes, but in the end i like how it did