Need info on Dansk Flamestone pics added  

Scuffs?
As in, the dark brown matte glaze is worn away? If that's the case, you can't do anything.
If you are talking about baked on crud, then I would soak it overnight in very hot water with a lot of Dawn dish detergent (the stuff they use to clean pelicans rescued from oil spills). Scrub gently with a 3M scrubber. No steel wool!
Hot water soak with fabric softener sheets is also a good way to loosen old baked on crud, weirdly enough.
Avoid using dishwasher detergents like Cascade. It leaves some finishes cloudy over time and I would not risk it at all.

another possible solution
cheesedanish,
I have several pieces of the Jens Quistgaard, Flamestone for Dansk Designs IHQ (they are users) and I was able to successfully remove the heat marks (from the bottom) and other detritus with a spray on oven cleaner (rinse and wipe clean with a sponge). The exterior finish was not at all affected. This product was made in the "good old days" and was designed and built to last. Good luck.

Thanks niceguy --is the glaze on the
inside of your pieces crackled? I like that look but want to know if it's from age or original.

interior glaze
cheesedanish,
I just took a look and there is a small amount of crackle to the interior glaze around the edges. This said, I must assume this is due to age.
I also re-checked the finish on the bottom and exterior sides and there has been no fading after using the spray on oven cleaner last year.
I purchased the Beehive, warmer stand, and large covered casserole at Goodwill for about $5.00 because I liked the looks of the Beehive with the warmer stand.

Thanks again Niceguy
Great deal for $5.00. I felt lucky to get mine for about $10.

I picked up a Flamestone...
I picked up a Flamestone covered casserole dish (~12" diameter) last weekend at a vintage store, with the intent for active use in the kitchen for cooking and serving.
While I have looked extensively for the older teak and rare woods Dansk pieces, I do not know much about the Flamestone line, which seems to have been offered over many years starting in 1957. The mark on the bottom of the dish has partially faded over time, but is the same as the one below, found googling. Based on the Danish spelling of "Danmark" which only appears in the earliest staved teak pieces, I am guessing that this is one of the earliest, if not the earliest, marks for the Flamestone line.
I am also wondering why Dansk would have moved away from such a nice distinctive mark to the more generic Dansk stamp on later Flamestone pieces.
Can anyone help me out on Flamestone dating? Thanks.
(P.S. - My cost was a little more than $5 or $10, but I got my find of the weekend earlier that day with a Poulsen PH4/3 deal)

Crackle
If you plan on using the flamestone the crazed enamel could break.
Nothing like eating enamel with your roast dinner.