Bed wood + clearcoat question

[Bowtie468]

Hey guys, looking for a little feedback here. I've heard of people using automotive clearcoat over the color stain. For the most part, spar urethane looks great and has excellent durability, but.... it also has a goldish tint to it. In my case, i'm using a black stain (Minwax Ebony to be exact) and i'm not too keen on the goldish tint that it gives once applied over the ebony stain on my test boards. Seems that on all other colors, it richens the appearance of the stain. But not to my liking on the black.

Whats the 411 on using auto clearcoat. I'm concerned about compatability since the stain is oil-based. Please advise!!