William,
My suggestion would be to use a gloss coat like Tamiya Gloss X-22 and thin with some Lacquer thinner ( Tamiya #87077). I use a 1 to 1 mix. Either airbrush or use a Red Sable brush and just hit the areas that you will decal, ship #’s aircraft insignia etc. Since this is a 1/700 ship I’d probably use a brush. I would also pick up some Micro-Sol to get the decals to really adhear to the surface.
After they’re dry use some gloss on the area again and let dry. If there’s no silvering then go ahead and hit the whole ship with a dull/ flat coat to tie everything together.
I only Gloss the entire ship if I’m going to weather her.
Hope this helps,
Steve