Any recom for best interior and exterior coating?

We declined the dealer’s offer since we’ve heard it wasn’t good and others advised us to do it our selves or go to other reliable shop.

GHHP-Max with Portobello C-chair, with its seat combination of leather and suede..What do you guys use for each

texture? The rear bumper also, how to make it shiny black and resistant from water mark?

Thanks in advance.