NX-01, I didn't do anything special to get the tint you see on the hull. I basically washed the kit and let it dry to remove any agents used in the molding process, then I put down my base color. Waited till it dried, and applied a clear coat finish. Let it dry, and applied my AztekDummy templates, then put on my darker coat. Waited half hour, and CAREFULLY removed my templates. Let dry thoroughly, and applied another gloss clear coat. ( Both main hull colors are Testors Metallizers, used right out of the spraycans ) My drying time between all coats was a few days to a week for each.
I then left the whole thing dry in the box with lid closed for about a week. I applied my decals next. The ones you refer to on the upper hull were not too bad to do. I just did them in sections, and made sure to apply plenty of decal set to the area before putting them down. Then I blotted them dry, and went over again lightly with decal set, to make them "hug" the hull contours. I let the hull dry overnight, and applied my final "satin finish" clear coat the next day. To do the decals you refer to on the aft hull area, I carefully trimmed them into the area, doing a dry test-fit before applying them. I thought the decal was too large to do in one piece, so I cut it into 3, and set it down that way, making sure again to use lots of decal set, and figuring the final clearcoat would make it look painted on. I took some poetic license, and painted the rear of the area with a yellow "warning" strip, to match the way I painted the rings around my shuttlepod access hatches on the ship. One can be seen directly behind the area, in the pic you asked about. To offset the aztec pattern on the hull, I painted a few panels here and there and around the bridge with a slightly light gray color before I put the last clearcoat on. Kinda breaks up the fully metallic look, and gives it that worked on by "Trip" look.
Basically, I just took my time, test fit alot of things, and didn't rush to do my painting.
Glad ya like what you see and hope the tips help someone who builds the kit. I like the design of it. A nice break from the Original Enterprise configuration.
"Boldly GO!" :wave: