Are you talking combustion area or water area( and not near oring surfaces). If combustion, as long as there arent pieces stuck in it, that could come loose, some will buff & reuse it. Is it worth it... not to me. Depending, it could create hot spots too. 1st ? Id ask is, is it from the current set up u have now? If so, you might have detonation issues that id address 1st!