So help out a noob out and explain:

I have improved all of my armour and weapons once, and they are now listed as epic or exquisite.
It seems I could improve them more by spending more time at the grindstone but it says I don't have the skill.
I have 80 smithing skill and the only perk I don't have yet is dragon/daedric armour.
How do I get the experience to take my armour/weapons all the way to legendary?

Thanks for any helpful input! :thumbsup:

You'll need 100 smithing mate.

http://www.uesp.net/wiki/Skyrim:Smithing

Explains it all.
Smithing without perks will require potions and gear with fortify smithing to be able to make anything Legendary. With perks it takes a lot less, and using the prior mentioned gear and potions leads to items having huge numbers.

How much you can improve an item depends on skill and perks.

http://www.uesp.net/wiki/Skyrim:Smithing

Scroll down to Item Quality.

Once you get to 100 try to craft with a blacksmithing potion then you can over-max the rating.

Drink a potion that fortifies smithing or wear an enchantment that does the same. A single +20% will get you to legendary.

Yep, even though an item is legendary, you can still refine it more if you make yourself a special smithing suit with all smithing enchantments and a potion too. Plus, if your enchanting is good enough to do that, you can plonk some dual enchantments on the gear then strut around like a bau5

Wow! Thanks for all the great information guys!