def reuse em, looked fine.
thats just one piston and took couple hour to soak n scrub, twas about as much as i could take for the night.
after soaking, the scrubber couldn't get off some bits of black carbon on the piston but i could just scrape it off with my nails and then clean with wd40/scorch pad. the dark conrod and underneath the piston is real tricky to scrub clean so just left it