Off-hand paint brush

Ok so I've struggling at painting whole base
so I suggest... what if paint brushes are equippable to off-hand slot.
when equipped to it, it automatically paint item placed that is paintable.
this way, I can switch over the paint brush to use other color too.

I had idea that what if painted items are craftable...
but it might really bloat the item list, and I knew how stressful when I made wrong color items and I have to just discard them...