Have used the following
Chassis Black - IMHO too muddy looking and didn't hold up
Their Insta Phosphate or blacking. Used it for small (rattle can lid full) jobs when I've forgotten a bolt or small bracket
Rattle Cans - for certain things they are fine but not always for shat they describe. The zinc rattle can is too blue for my taste, clears are nice but don't last (shouldn't expect them too) Use the carb color and the green from the fake dichromate line for PVS. You get the idea - problem being is that you have to buy allot of them and experiment to find out what they will work for. Nozzles plug too quickly
and the opening is the small size so most nozzles from other brands do not fit.
Like the solder flux for retinning the gas filler necks
As for hardware and tools - most of the time I can find them elsewhere - not re-branded - for less.
Just my experience over the last ten years or so. I'm sure others will have their favorites - mileage will vary
