One of the harder colours to ID on ships, AX-019 1975 Depot Buff 30ml Acrylic paint is believed to be the pale yellow colours on Falcons and X-Wings. Also Possibly used on Fett Armor. 

To be thinned with Archive-X AX-ATR thinner for airbrush use. Ratio's vary from colour to colour with an average of 70/30 paint to thinner.

Thin's with water for brush use.