I bought a couple of Pepper7 plastic jerrycan castings a while ago, and finally got round to thinking about painting them this week. While considering what might be the best colour, I fell to wondering if it would be possible to make them look like translucent plastic with a liquid inside.
The first job was to give them a quick spray with white car undercoat. When that was dry I masked off the upper part with masking tape to give a level line all round. I made up a weak mixture of Tamiya Desert Yellow and painted that onto the lower portion of one can, then added a little Humbrol pale green (an ancient acrylic I found in the back of the garage) to give a different effect and painted that on the other. When that was dry I removed the masking tape and painted a very thin mix of white to the rounded edges, hoping to show the varying thickness of the plastic. Finally, I gave the cans a coat of Silkcote varnish, hoping to impart a plasticcy sheen to them. This is the result ...
A cruel close-up - but does it convey the impression I'm after?
If I wanted to be clever - and I have more of the castings - I could make the liquid level slope and have the cans tilted, but this'll do me for now.