I know this is pretty esoteric, but here goes: Have a 1978 CB750 F Super Sport that needs to have the OEM muffler chromed. Question is, can the black muffler end cap and baffles be removed without totally destroying it. If so, how please? The fasteners resemble oversized, hollow rivets and do not seem to screw in like a conventional bolt-type fastener. Thanks in advance for any and all responses.