I personally love these paints
Last time I used them was on a 1/72 scale Mi-24 Hind, about 5 months ago(had a short break due to my son being born
)
Through my airbrush, an Aztec 4709 at that time, they sprayed beautifully mixed with Tamiya thinners, about 60/40 paint/thinner.
This mix sprayed so well, I didnt even have to use any form of masking for the camo scheme.
The pigment density is super, but the hand painting characteristics is a little poor, but thats the same with most acrylics I feel.
As for painting over them, all I used was Gunze semi-gloss.
But this feels a little 'sticky' to touch even after curing, so I advise a coating of Pledge One-Go.
I also used Micro Sol and Set for the decals, and this didn't affect the paint at all.
Hope this helps
Sean