Those paint jobs look good! It is hard to get great results- I sometimes use a spray paint to avoid brush strokes, but it is hard not to over-spray and get runs. I found I had to use a plastic primer undercoat to get the paint to stick to ABS plastic.
Another alternative I have been playing with recently is to use digital photo-manipulation to change the colour of PM parts.That way, no PM parts are harmed in the filming process!
I am no adept, but having Photoshop Elements on my laptop (which I got a few years ago in a software bundle with a new camera, I think) I played around with the Quick Selection Tool and the Smart Brush Tool. Here are a few results. PS shows the photoshopped part (in case you can't tell!)
Before
![](http://i1287.photobucket.com/albums/a621/GrahamB2013/IMG_6844_zpsmsjvxnza.jpg)
After
![](http://i1287.photobucket.com/albums/a621/GrahamB2013/IMG_6844b_zps98u55m6m.jpg)
Before
![](http://i1287.photobucket.com/albums/a621/GrahamB2013/IMG_6855_zpsmxqbpl7i.jpg)
After
![](http://i1287.photobucket.com/albums/a621/GrahamB2013/IMG_6855%20c_zps5nhgidie.jpg)
Before
![](http://i1287.photobucket.com/albums/a621/GrahamB2013/IMG_6857_zpsr59fxeas.jpg)
After
![](http://i1287.photobucket.com/albums/a621/GrahamB2013/IMG_6857a_zpsdwo7whoi.jpg)
Before
![](http://i1287.photobucket.com/albums/a621/GrahamB2013/IMG_8186_zpsjv6678nt.jpg)
After
![](http://i1287.photobucket.com/albums/a621/GrahamB2013/IMG_8186a_zpsoqvkbmfy.jpg)
I think the white waistcoat is the best of the ones above.
And when short of a part, Photoshop can help too:
Which of the helmets is the original and which a PS copy?
![](http://i1287.photobucket.com/albums/a621/GrahamB2013/IMG_6826a_zpsqw4trxzq.jpg)