I have spent my entire life trying to make them "shiny rolling art"! I can't go backwards now....

...but you might try adding some PPG DX685 flattener to the final coat. There is a formula on the can for "semigloss" and for "full flat". You will want less added than either of those. Try it on a test panel first to get the look you want.

Another thing to try would be to sand with 2000 or finer paper... then buff with a soft pad and some polish, to get the amount of gloss you want. The polish won't leave the buff marks that buffing compound will.

If you can get it just right... expect people to offer to paint it for you. LOL! :-)