Cash Shop Specials: 9/25 - 10/2

So this may be the wrong place to ask but... newb question!

I found a Brown Guitar while out killing aliens and I kind of love it. But it's not a weapon any of my characters can use. With the Anvil if I fuse it with the stats of a weapon they CAN use will it automatically become that kind of weapon? I want it for the Demon Slayer I'm going to make pretty badly because the idea of a Demon Slayer rockstar whacking things with a guitar is awesome to me.

You can't Anvil two different weapon types, so you can't make an axe, a staff, for example, can't turn a one handed sword two haneded, or vice versa.