Its a simple suggestion:
Add a blacksmith in each fief. You pay him XX% of the basic item price (no discount) to give back 1 loomlevel you lost on the equipment.
So after a battle you started with +0 gear, you will end with a lot of -2 gear. Then you are able to repair it, but only if the fief can produce that tier equipment.
so if a fief can make +2 rus bows, you can repair your rus bows as far as to +2. I suggest 10% of item price per repair.
So it you have -3 pikes, and you are in a fief that produces +3 pikes, you can repair them all the way to +3 for 60% of the item price. This is not always usefull, since many fiefs have discount on items. So if there is a discount of 50% on pikes in this situation, you will not repair but simply buy new ones.