ORIGINAL: w8ye
That cylinder sleeve has peeling on the outside too which surly doesn't have anything to do with how you ran it.
Is the sleeve plated also outside?
Copied from Tower:
"Advanced Bi-Metallic Liner. This process uses a double layer of
plating material rather than one thick layer. This helps the metal
to bond to the cylinder and is more durable. Also, the plating
process is more consistent, resulting in a more precise fit between
piston and sleeve for better compression, longer life."