I managed to resist the grey/dunkelgelb combination and have just given the turret its first coat of xtracrylix dunkelgelb which has more of a brown hue than the tamiya dunkelgelb and is a colour i prefer.
Not sure how well this photo will show the difference but the hull is tamiya and the turret is xtracrylix;

The xtracrylix dries to a satin finish and so will need a coat of flat clear when the paintwork is complete. i hope the satin finish may help with decals - my track record with decals is ugly to say the least!