high gloss finish
 

At my job we're looking for high gloss finish and we've tried a few different types.
Acrylic enamel, modified alkyd enamel, acrylic urethane, urethane enamel.
Imo best gloss came from acrylic urethane. Is there anything else we could try besides going with base/clear automotive finish?

Nope, you pretty much tapped the market out.

Imo the best gloss is with Acrylic Urethane, am I right?

The best would be to go with Base Coat/ Clear Coat. Cut and buff, then floss your teeth using a the mirror image of yourself in your cars paint.

Why would you not want to use Base Coat/ Clear Coat?

It's just machinery, but higher end machinery so we're using higher grade paint than just acrylic enamel we use on everything else.

In your case, acrylic urethane would give the highest gloss.
There's lots of industrial enamels out there, but none are
very glossy, at least not as much as automotive paint.

Just curious, what type primer are you using, epoxy?

Urethane clear is the way to go, but be advised there are varying levels of gloss in urethane clears.

Vince

If the acrylic urethane you are using has a compatible clear that uses the same hardener, you may be able to mix the last coat 50/50 for a glossier finish, if the paint mfr. allows for it.