Upping fomulas

[dkim]

from the Arreat Summit

1 Lum Rune + 1 Pul Rune + 1 Perfect Emerald + Exceptional Unique Weapon = Elite Version of Weapon (Ladder Only)
This formula changes the base item type from the exceptional to elite version. For example a Cleaver is turned into a Small Crescent. This does NOT convert the item to the Elite Unique version of the Exceptional Unique Item. Unique item bonuses remain the same; only the item it's based on is upgraded. This can be used to upgrade Ethereal Items also. They will continue to be Ethereal after they are upgraded. You cannot do this formula unless you are using a Ladder Character. Also if the item is socketed, then jewels or runes and their mods will also remain.
1 Ko Rune + 1 Lem Rune + 1 Perfect Diamond + Exceptional Unique Armor = Elite Version of Armor (Ladder Only)

but, how do you up shields?

[jedimaster86]

When they give the armor upping recipes on that site, they are referring to any type of armor: body armor, helmets, shields, boots, gloves, belts, and any other type of equipment i may have missed that offers defense.