I just have a few questions...

1.If I make weapons at the skyforge are they better?

2.If i make an alchemy outfit then made a fortify enchanting potion then make another alchemy outfit and so on can i sooner or later have a realy powerful alchemy outfit?

3.Fastest way to lvl up alchemy?

3: Wheat and Giants Toe. There's also something with butterfly wings.

1. From what I have seen no, but if you finish The Companions questline there is some stuff that can ONLY be made there.

@SexyToad: is it possible to upgrade any iron item to legendary or is the highest iron will go is flawless??

@Z3RO180: Im pretty sure that iron weapons wont go past flawless. To upgrade weapons to legendary you need the corresponding perk. The lowest perk there is, is steel. But i don't know why you would want to upgrade iron weapons .

Iron? What are you fighting, butterflies? 
 
1. No. Just the "Skyforge Steel _____" weapons Grey-Mane will give you if you join the Companions. And then later the "Nord Hero" and "Draugr" unique equipment.
 
2. Yes. There is also a unique item called the 'Notched Pickaxe'. When held, this fortifies your Smithing by 5. You can't raise the bonus by breaking it down and enchanting a different weapon -- the bonus is fixed. 
 
3. Giant's Toes plus anything else that has a "fortify health" effect. This is because of an error giving Giant's Toes a 300 second duration on the Fortify Health effect. 
 
4. Iron and Leather can be upgraded past flawless if you boost your Smithing skill.

@SexyToad: ryt cool thanks m8 i thought it woudent go past flawless i just wanted to cheack so yea thnks for confiming it m8 =)

@Z3RO180: I had a skyforge sword go to [epic] as its designation, so if your crafting is high enough you can get it there (it did 80dmg at that)

@Storms: @s7evn: must have been a glitch for me then any way thanks for the info also im starting agin and cant chose between hadvar or ralof i know the chose doesnt hold me to eather faction t just so if i join eather the stormclaks or the leigion i already have a buddy there so i cant decide cause i like both of them.