Acrylics on Polyethelene.

This actually does not have anything to do with scale modeling, but perhaps someone can help me.  I own one of these sleds, which are made of polyethelene.  I want to airbrush something onto it, and since I own a wide range of Tamiya acrylics I would like to go that route rather than buy up a bunch of laquer based paints for such a small project.  Now obviously I realize this means I will probably have to prime with a laquer based product.  So now for the questions:

1: I will lay down a matte clear base using Krylon (so that the blue sled color shows through).  Since I only know this works on polystyrene do you think, as long as I don't go crazy, the polyethelene will be fine also.  by that I mean do you think I will melt the plastic?

2: After I am done spraying the acrylic colors, and after appropriate dry time, I will spray again with clear to seal the acrylic.  How durable do you think this will be?  Obviously I don't think it is going to withstand high wear, but do you think it will withstand my fat bottom rubbing on it?

3: If the acrylics just are not going to cut it, even with the laquer primer and sealing coat should I just suck it up and use laquer based paints?

Brian