[Grady Clay]

Roslin,

You are getting good advice here.

I agree that most important is to keep your rebuild absolutely clean. This is particularly true of cleaning media. Processes that don’t have the possibility of contamination are clearly best.

Some techniques (sand or glass) have the advantage of roughening the surfaces for better heat transfer. At the same time, extreme care must be taken to prevent any media inside the engine.

There are different processes for different parts of the engine. There are even different processes for different surfaces of the same part. Masking and other protective measures are extremely important. The goal is to have the surface appropriate for the use. That can be cooling, friction, beauty and more.

Best,
Grady