On top of oil paint

[Bongo]

An artist I follow on Utube, painted some figures in water color over wet oil paint. I didn't know you could do that. So, I was wondering if alcohol inks could be put on top too. Posca pens I believe are acrylic so would the "peel" at some point?

 

[snoball]

Why not just try a tiny sample or two? And bring back the results.

 

[Bartc]

I'm soooo doubtful about this one.

 

[Rich53]

An artist I follow on Utube, painted some figures in water color over wet oil paint. I didn't know you could do that. So, I was wondering if alcohol inks could be put on top too.

Maybe it was water-miscible oil paint?? ¯\_(ツ)_/¯

Posca pens I believe are acrylic so would the "peel" at some point?

Knowing several house painters, a cardinal rule is, "Never, ever, ever put water-based paint over oil paint! DON'T!"
Because in a few years you'll have an unhappy customer and your reputation will be mud.

 

[Bongo]

Sno, Bart, Rich -- I know from experience painting acrylic paint over drawers and bookcases that were oil. Paint came off in sheets.

So I was surprised when Michael Chamberlin,, an accomplished Plein Air painter, used water color over wet oil paint to sketch in some figures. I've since googled it, and google says it's okay, and google is always right I don't have any watercolor so I couldn't test it.

I did try Posca pens - they work great. But they are garrish opaque colors, that I'd never use. Plus they look like they're sitting on top of the paint and not part of it

HOWEVER, I tried alcohol ink and it dried instantly to a fingernail resistant coat that looks like part of the painting and not "sitting on top"
This is exciting, this will be a game changer for me if I can do washes with alcohol inks.

edit -- this is just a guess, but I think the difference is acrylic paint forms a plastic shield when it dries, whereas with alcohol ink and water color - the fluids evaporate and leave pigment, rather than forming a shield.