Mabinogi World Wiki is brought to you by Coty C., 808idiotz, our other patrons, and contributors like you!!
Keep this wiki going by contributing to our Patreon!
Protection List
Well you might be partly right. Just looking at the jp wiki page for reforges, http://mabinogi.wikiwiki.jp/pukiwiki.php?%C1%F5%C8%F7%2F%BA%D9%B9%A9, it says protection reforge can go on accessories and the cap is level 4.
However, looking at the kr gameabout page for reforges, http://mabinogi.gameabout.com/guide/?id=776&cont=5301, it looks like accessories have a protection level cap of level 3, head gear has a protection level cap of 4, and boots, gloves, shield, and body have a protection cap of 5.
So if I went with the kr gameabout data I guess it would work out to be -2 for accessories and +4 for other non headgear for a total of +2.