Yes, but it doesn't colour all the materials, cause there is separated materials.
When aim at the model, a list of the model's materials will show up, the first line its the hole material that can be painted, the others material below is the one separated.
Find the wound or ragskin material and color that one.
If nothing works, then i will find a way and post it here.

i have the same issue, but when i aim at the model, no list of materials shows up?

did u even use the advanced colour tool tho?

the advanced colour tool works a treat, thx

Where do you find the advanced colour tool ? Can't seem to find it.

it's on the workdshop (reuploaded)

The problem is that the Advance Color Tool conflict with alot of addons and is not all of that relaible with the Submaterial tool.

does the tf2 painter work with it?

or is that the "advanced colour tool" everyones talking about?

the advanced colour tool

When I use the color tool on the skin part, it just makes it brown no matter what color I put it to

now im not sure if I have the correct color tool, can someone post a link to wich "color tool" im suppsoed to be using

I use advanced colour tool ,but I can't change the blood colour . Can anyone help?

Update :
This addon will be updated in the next month

I think the tf2 hat painter might work

To change the color of each part of it, use Sub Material Tool https://psteamcommunity.yuanyoumao.com/workshop/filedetails/?id=405793043