I have built the ancient Airfix Mark IV Male a couple of years ago; back then it was the only plastic Mark IV on the market, and it was cheap…
It was a surprisingly easy build, and the fit was remarkably good.
The gun mount is not the best -when it points forward, you can see a gap on the back of the gun. The exhaust pipe on the top does not have any connection to the engine, either. (I did not know that it was an exhaust pipe at that stage.) The rivets were nice, though.
I had no airbrush, so it was all brush-painting… the contrast is too high, and the thing looks like a toy. Not to mention the flexible tracks started to shed the paint. It came off in flakes, and it was a difficult problem to fix. Rubbed most of the paint off, and kept reapplying again. All in all, it is a disaster.
Finished product after layers upon layers of burnt umbra/sienna filters. I essentially used tinted thinner and covered the model in layers. And layers. And layers. It did not show at first, but by the end I was surprised how well it blended all the colors together.
All that was left was a little streaking with oil paints, and the application of wet (and dry) pigments (fixed later with pigment fixer) on the bottom half to simulate mud churned up by the tank. The side of the base was lightly sanded to get rid of the brown pigments. The results are surprisingly good considering how it started out. Not a show-stopper, but at least a passable tank.
The conclusion? Filters seem to work. (What a surprise…)