Blood Red & Sunburst Yellow: My two arch enemies

Motivation is somehow back and I am starting to paint again. And having to face my two arch enemies: The (very) old paints from Games Workshop, Blood Red and Sunburst Yellow. Those two paints just will not create some reasonable layers, the pigments in them just flow around and give a uneven, semi-transparent, blotchy layer. Even doing multiple coats will not work with them. And painting them on anything else than a white (or light gray) primer gives you headaches. With the airbrush the colors work OK but I can't use my airbrush on all those small parts of the miniatures.
Either I am too stupid do use those correctly or these colors are really a pain.

The problem is, that I still have to use them, because my Chaos Dwarves will use the red, and my Skaven Slaves have yellow clothing...

So if anyone of you has a good tip how I can get those two colors to work I would be happy... Or is there a nice basecoat red and yellow color from other manufacturers like Vallejo? So that I can only use the GW ones for highlighting. I know that there are some basecoat colors from GW but I switched all new colors I own to the Vallejo ones and I am more than happy with them.

And to complete this post, a bad shot WIP picture of the thingy I am working atm: The Ramshackle Drill I got a looooong time ago as present from Labschi. The brown parts will later be covered with a brass/gold paint and the metal parts will be weathered and be more metal (its just the first drybrushed coat). The red parts will stay, I like the dirty look of that, the first time that its OK that the red didn't cover so good :)

This thingy will either be a proxy for a Skaven Doomwheel (if I ever need a third on in a game) or most likely be used as a Chaos Dwarf war machine. I am thinking of the Iron Daemon since I don't want to buy the Forgeworld one and all my Chaos Dwarf models so far are the Mantic Abyssal Breeds or proxy models from other companies.


So long,
Paradox0n