That's all " lacquer acrylic " resin . Both the primer and the Tamiya color coat .

What are you concerned with ?

The solvent removing the primer ?

The solvent will soften and bond the color coat to the primer . Problems would occur only if the reducer ratio ( amount of lacquer thinner ) is too high .

The lacquer thinner will evaporate before it can dissolve the primer coat significantly .

Brush application is trickier since the paint volume during application is higher .