NSFW -- adultOk, Vallejo pigment experiment.
It's simple but also complex. It was just wild experimenting without a goal or empiric studies.
Started with an s29 I once experimentally colored with a pastel powder stick, extracted from pastel chalk. It was brown and split into reddish and very dark pigments. It had really dark stains on some areas. Wasn't too bad but I put the body away for some time.
I recently cleaned it with some outdoor body wash detergent. It was not completely cleaned but had an even color and all the dark stains gone. Don't know if all this is relevant to the adhesion quality of the pigment I added later.
Actually wanted to try the Make Up powder method, but I don't have this stuff (nudebynature) and it's too (censored) expensive to just buy it to colour dolls.
So I used Vallejo Pigments on the cleaned body, might be similar I thought.
One can of Pigments is enough for a lifetime of weathering everything, so I could spare a bit. I did not use those regular artist pigments, because they were invented by the evil gods of darkness to torment artists and everyone living with them.
Just dabbed the finger in the pigment can and spread it evenly on the body. It's very fast.
Made it a bit wet, but don't use too much water. Also used window leather to rub it it. If it is completely covered, a lot will come off though.
It didn't stain when trying tissue, but it lightly transferred color onto the leather.
I tried using Ethanol, it blended the color transitions very smooth. It evaporated fast, after that I cleaned it with water. Because the figure smelled like an alcoholic. Didn't really lose color anymore. Baby Powder after drying, reduces staining a lot.
Oh and I tried oil paint too after all that, but didn't have the patience to let it cure/dry and washed it off again, didn't change much about the powder cover.
So.
Pro:
Nice natural looking blending and shading, alcohol helps with that
Easy mixing with other colors
Very fast
Probably completely removable again with the right detergent
Con:
Slightly transfers to some materials
Colour Covering is not that strong
Very dark colours probably not doable. I tried it with very dark pigment on another body, but most washed off. Good for tanning though.
And it's a bit messy, use safe environment
Tried on a broken white coverall, at the seems you can see slight brown traces.
https://i.postimg.cc/SRGCPZV2/PSX-20211202-175553.jpg