I spray thin coats of Tamiya gloss black enamel and when I have a good cover I spray a last coat of 10% enamel and 90% miniral turps. I found that the turps flashes off slower than thinners and lets the enamel flow out well.
. by Theunis van Vuuren, on Flickr
Then I use airframe alluminium to give various shades by masking off some pannels and then spraying a few more pannels to lighten them.
If I want a slight weathered look I will shoot a thin coat of alclad clear semigolss to dull it down a little, it doesnt alther the metal feel of alclad.
. by Theunis van Vuuren, on Flickr
Here it a Mig 21 in the same tecnique of airframe allu over gloss black, for a higher shine I use clear alclad closs
. by Theunis van Vuuren, on Flickr
On my F-51 I used duraluminiu on the wings and airframe allu on the fuselage. This time weatherd with semi matt clear alclad.
. by Theunis van Vuuren, on Flickr
Theuns