Have to say I love them John. Have you watched the video tutorial on Promodeller? If not I really suggest that you do as the technique is simple but worth learning from the creator of this stuff. I have used it on all my kits over 1/72, you can see on my Spitfire how it has brought out the detail of the panel lines, especially underneath on the lighter colour. Most of the weathering on the French Carrier have been done with the wash as has the figures and aircraft on the FW190 dio. The officers especially were done with the wash. The ground crew in black were drybrushed with grey. Also the wooden planked area which the aircraft stands on was coloured and weathered with the wash.
I would not be without it. I know there is a new colour coming out (don't know what it is yet, to be released next Tuesday). Uusually available to members only, there is a thicker white that comes in a spray bottle as it is too thick to airbrush (yes you can airbrush the standard colours), which is called 'winter camo'. I have some but I have not tested it yet but is appears to give a whitewash effect over a standard base colour. I have a project coming up that will test it out..
The main thing is to really give them a good shake. They are, primarily, very fine ground coloured clay suspended in water (although there is a bit more to it than that). As such, the suspension does drop out fairly quickly but not stupidly fast. A good shake and if brushing on, get your brush well into the bottle. Don't worry about bubbles, they have no adverse effect to a general wash.
The main aim is to get the coloured clay to settle in the grooves so that when wiped off the surface, the settled stuff hangs into the grooves and shades them. To achieve the best, give it time to dry. Although it will appear dry on the surface, the thicker sludge in the panel lines will take much longer to dry out fully. If it is still wet when you wipe over with a damp cloth, you will take more out the grooves than you want to.
