A good airbrush would be the best thing to use.
Warming up the Dullcote in a pan of hot water is a good idea.
Testors had Enamel in those spray cans also ( something I learned the hard way )...........the fast drying laquer base in Dullcote sprayed over slower drying enamel will make a crackle effect in your final finish that looks like your caboose roof. Gloss could have even been a slower drying laquer.
@SIRT posted:I stopped using T.D.C. a few years back for weathering. Spotty texture is good for what I do. If the spots are large, clean the nozzle. I just use it now only over decals. Seems they changed the formula and also raised the price. It has a satin shine since the change and is no longer flat.
Use Krylon clear flat as a substitute. I buy it by the box / case at Lowes. A large can goes a long way with a lower material cost as well.
I also use the Krylon Clear Flat now. It makes a nice flat finish.