You might try a little WD-40 on the scuff, it may bring up the color. It is reversible, you can clean it off if you are not happy with the results, but be careful, do not rub or as other forum posts state, rubbing will cause a change in the sheen. So will WD-40 but it is relatively harmless if not used near decals or lettering. You can even gently apply over the entire roof to even out the sheen, it will probably be slightly more glossy, but probably more even. Just gently wipe off excess. Works really well on polymer gunstocks too.
Good luck,
Chris S.