Vertex painting error. Texture is black in some places

Can any of you tell me what could be causing this error.

I have a vertex color shader setup. I have it setup as to where the smaller text can be painted over the larger text.
For some reason, the smaller text comes in black over certain areas. (see screenshot)
I’m assuming it’s some kind of blending problem, but I can’t figure out why??

Enable blend weight then hold CTRL or SHIFT (one paints one erases), can be a little confusing. If its black then you need to change the RGB setup from the drop down, and the select boxes for erasing and painting. Can also be a material related issue, i think, sometimes you have to enable the vertex layer first.

Thanks for the reply unit23.

Looks like I found out the problem. I needed to put a couple of clamp nodes in my material.