3D Model texture glitch

I've created 7 weapons and only two of them are having this problem.
The first weapon I created - and the last weapon I created.

This glitch seems to have small or big random color spots all over the model.
I's like someone dropped some paint on the model and it left a small spot.

this one has a lot of random brown and yellow spots all over it.


Looks like someone dropped paint on the tip of the sword.