After coming back into the hobby after half a decade, the best advice I can give to painters is;
Foundation Paint: Only use these. Less coats = Less hassle. If you can't get the colour you need, use a 75% mix of the colour with 25% a foundation colour as close as you can to what you need. This helps it to cover a lot easier in less coats. Stippling works well to basecoat over black.
Thin your paint: Foundation paints=Enough so it flows easily, but covers on one coat.
WASHES, WASHES: Citadel washes are the dogs dangly bits. After steering clear of ink's for years. I was given a demo of the new washes and how to quick shade. I became an instant convert. Buy Devlan mud for your possessed and give them a heavy coat. All the detail will be picked out immeadately. Seriously, drown them in it. You'll be smiling after it all dries. The heavy coat will blend the choppy edges of paint down too and camouflage your shaky hands.
1. Paint W/ Foundation colour. Doesn't have to be exceedingly neat. Just an even coat.
2. Wash the excrement out of the model with either Devlan Mud or Badab Black. It might look horrificily bad as you are doing it, but the stuff REALLY reduces as it dries.
4. PROFIT! You now have tabletop grade minatures.