Lca,s were dipped in some preservative, not black. T-bars are springs and had some sort of flexible, black, coating. (new T-bars often come bare and can be sprayed with rattle can under coating).
If not going with a full factory restoration, just make sure everything is protected with a quality paint.
I really like Hot Rod Flatz urethane 201, and chassis black. They are very tough, uv resistant, easy to spray. 1 quart will go a long way... Front suspension, rear axle housing, core support black out, K frame, dash frame, steering column, etc...
The grill was painted with 201. I also used this for my tail panel black out, core support and many other little parts.
The window trim was sprayed with chassis black.