89 Burb rear resto: bedliner and plastic/carpet panels

[Electricduane]

Hi all: 89 Suburban 2500 4x4 diesel. White w/ blue interior.

I removed the rear carpet (trunk area) of my suburban because it was trashed. Headliner is also gone, it was trashed.

My thinking is to spray bedliner on the interior of the roof and also on the floor from the tailgate up to the rear of the first backseat. At that point, the second section of carpet begins. I will leave the carpet there. So carpet will extend from the front seats to just behind the first backseat. From that point rearward, it will be bedliner.

I'm hoping some of you smart folks with experience will have some advice/comments on the following:

PREP: There was some surface rust under the headliner. I am carefully wire wheeling it off and spraying "converter" primer on it. There is a small amount of rust under the support bars (that are glued on) that I don't see any way to get to. I'm going to do the best I can to spray those spots with converter primer and call it good. It's just surface rust from 30 years of condensation.

BEDLINER: I have a good bit of experience with this, having had a Jeep and a K5 sprayed with high temp, high-pressure polyurethane (Line-x or similar). IMO it's expensive but worth it. I am not interested in do-it-yourself bedliner.

I know they can adjust the texture of it and can also make it virtually any color. The roof needs to be a lighter color in order to distribute light.

What about a 2-tone effect? Darker gray/black on the floor, then lighter gray on the roof/sides? White would probably look weird and get dingy fast.

REAR PLASTICS: These are a little bit rough, one (pass side upper rear) has a big crack in it and several have paint (white) scuffs. They need to be painted, at least, and I hear that plastic paint stuff doesn't work very well. That said, what about just getting rid of all of them? The large center cover for the rear A/C needs to stay, and then the pillar for the rear driver side (C pillar?) needs to stay to cover up the air-conditioning lines. What if I sold the rest of them and just went with the bedlined look?

Another friend said that you could "have them dipped," I suppose meaning some sort of plastic-dip finishing process. Anyone familiar with that?

Thanks in advance for all advice/comments.