On Thu, 4 Jul 2019 08:34:48 -0400, Wade Garrett wrote:

On 7/3/19 11:44 PM, Sirgerlad wrote:
replying to Tony Hwang, Sirgerlad wrote:
So, what do you use to clean the carbon buildup on the top of the piston

Wooden popsicle stick or similar. Nothing metal!

Copper tools work fine.