I jumped over to test centre a few times and tried reforging katanas and shields with nothing selected (1 charge), then just powerful (2 charges) all the way up to exalted, grand, sublime, blah blah artifice at 6 charges a shot. So far nothing I have produced on test centre has encouraged me to try using the hammers for real.
Here are some of the things I produced using a valorite runic on test centre.
Using Powerful reforge only on Katana (all items have 40% damage increase from initial creation unless otherwise noted)
Katana #1 Hit Fatique 20%, HLD 70%, MR 3, DCI 15, FC 1,
Katana #2 Hit Life Leech 75%, STR +5, Luck 80, LMC 5%, DI 50%, Cold Resist 5%
Katana #3 Hit Life Leech 25%, Mana Drain 30%, HLA 70%, DCI 20%
Katana #4 Mana Drain 30%, Spell Channel, INT +4, HCI 15%, DCI 20%, FC -1
Katana #5 Hit Life Leech 20%, Stamina Inc 5, HCI 20%, LMC 4%, SSI 15%
Katana #6 Hit Mana Leech 37%, DEX +5, SR 3, HCI 15, Fire Damage 100%
Powerful with Animated of Wizardry (6 Charges)
Katana #1 Spell Channel, DEX +4, Mana Inc 3, Stam Regen 6, MR 6, FC -1
Powerful with Animated of Haste (think that's all I chose)
Katana #1 Hit Stam Leech 60%, HLD 50%, Stam Inc 5, Stam Regen 3, Enhance Potions 5%, Poison Damage 70%
Shields with no selection (not even powerful - all shields have 1% poison resist)
Shield #1 STR +5, Stam Inc 4, HCI 3%, DCI 20%, DI 10%
Shield #2 STR +4, DEX +4, Mana Inc 5, FC 1
Shield #3 STR +4, Stam Inc 5, DCI 15%, LMC 4%
Shield #4 STR +5, HR 1, Luck 130, HCI 5, DCI 10
Powerful Animated of Aegis
Shield #1 Soul Charge 20%, Stam Inc 5, DCI 15%, SSI 5%
Shield #2 Soul Charge 20%, Stam Inc 4, DCI 20%, SSI 5%
Shield #3 Reactive Paralyze, Stam Inc 4, Stam Regen 1, DCI 15%, SSI 10%