Thinking about what Svennn has just said - why isn't acrylic paint a primer?
Sure, it isn't its main purpose, but primers for miniatures usually work by shrinking as they dry, creating the mechanical bond to the mini and a layer on which the colours your actually want for the miniature will with bind with. Maybe is doesn't shrink as much as gesso does, but that doesn't prevent acrylics being effective as a primer, as a good amount of anecdotal evidence would suggest.
Not trying to be confrontational, you understand. I just want to understand your reasoning, OT?
Well that's true all three paints I have used shrink to reveal the detail

Why would I want to rub my figure to make sure the paint doesn't rub off?

I stick to washer , fill in the base, attach to old paint pot with blue tack, never touch figure again, so paint all colours, then base then varnish then finish. If i base or photograph after taking the figure off pot I handle very carefully.
dodge