My old Rover used to be black cellulose and compounding brought up a good
shine - although I prefer Farecla to T-Cut. Obviously, a good wax can
improve that shine, but I certainly wouldn't have called it dull.

Perhaps dull is an overstatement but I could easily see how far I'd got
when waxing a panel. The extra shine was quite noticable. The finish
looked OK after T-Cut but the improvement after waxing was worth it.
Hopefully that's what the O/P wants. He may decide to stop with the
T-Cut finish if he goes that route though.

John