And as for Today (it's 15/06/2013) my last "finished model" was Tamiya's Pzkpfw II Ausf. C - Polish Campaign kit.
This time I tried to apply dust effect in different style (wet dust pigments), but it turned out too unpredictable and almost costed me model when I tried to dry some areas with hairdryer (hmm, I'm bald so it wasn't easy to find a dryer

).
I also tried two colour chips made with brush, which seem to be very promising and with practice will give the very good results.
Before practice some ... best practices I learned from these "study models":
1) Be patient - standard one, but I cannot express nothing more important - don't rush around the model, don't put to much paint at once and so on... It won't bring you any closer to the finish, but will cost you a lot of stress and nerves (and some messed kits as well);
2) Don't overdo! The weathering effects should be subtle, yet visible and should compose into one harmonous picture of built kit or diorama... Otherwise you end up with some too many pigments like on my first tries - it wasn't by purpose, but these models now look like if I wanted to cover some mistakes with dirt...
3) Have fun and take a break! Yeah, although I have only started maybe 7 kits, 3 finished, 2 messed up and two being built, but I already was quitting hobby again for thousand times... If you get stuck, have problems... stop, take a break, go do something else. Calm down and restart

.
What I have to learn (among tons of other things

)... It seems the biggest problems I have are:
1) airbrushing... still these pressures, valves, buttons, needles are too unpredictable to me, but yet I started doing less errors

2) decals - who could believe my worst nightmare would be decals - look at pics of this tamiya kit... these side R03 numbers are so crappy... In fact I don't know how to deal with decals when they're put on the uneven surface. I use Micro Sol and set, but each time they seem to wrinkle very unpredictably and get crooked... I don't know... may I should cut them or trim somehow? Any help guys?
Now the pics (sorry for this yellowish "style"):
Ok, enough of wall text for now

Next SHerman and P-39 (but they're still on the bench

)