Future does produce a glossy finish so many modelers will introduce a
flattening material or only use it as a pre-decal sealer. If you wish
to use flattened Future as a final coat here are a couple of suggested
ratios of Tamiya flat base for different effects:
1 part flat base to 3 parts Future = very flat
1 part flat base to 10 parts Future = flat
1 part flat base to 15 parts Future = satin
If you get too much of anybody's flat base on the surface of your model
you run the risk of making it all go white. No thinning is required
just make sure it is well mixed.