This is a section of a poster from the 1960s for the James Bond movie Dr No.
Just focusing on the colour only, and not quality of the black lines, it has rough and uneven quality. It's somewhat blotchy. In addition, there's a kind of of a canvas texture as well.
I have an image that has a layer of colours, with some broad shading. What I'm trying to do is push those colours and shades into the direction of something like what's in this poster.
I've experimented with the default Photoshop plugins available in the CS2 version, which is what I'm working with. The rough pastels texture seemed to come closest, but it has a heavy horizontal direction to it. The poster I'm referencing doesn't go in any particular direction. And I can't figure out how to get the "blotchiness" of the colour at all.
What filter, or combinations of filters, or techniques might I use to try and modify my existing colours to have the same look as the colours in the example Dr No poster?
Just to be clear: I am not expecting one big magic button filter. That would be nice, but I would expect it would be more of a process, a set of steps, or a series of techniques. Whatever it takes, I am looking for a specific result. I'm not biased about the method.