If I had to guess, from what I see..

The carb is flooding, and fuel is being pushed out of the top vent whenever the intake manifold pressure rises above atmospheric.

If you’ve ever been able to carefully observe the intake on a running engine, you’ll sometimes notice that fuel charges are repeatedly ejected from the carb mouth and then abruptly sucked back in, as the cycle progresses. This is the result of pressure in the intake rising above atmospheric during a cycle.

If the fuel level in the bowl is too high, I can see a situation where the pressure pushes fuel right out of the carb vent.. as the same pressure that bears on the intake also bears on the fuel in the bowl, via the main jet (and possibly other passages).

Anything that influences the carb float height can cause fuel level issues. I have no direct experience with the carb you’re working on, but they all have one thing in common – there is a relatively tight range for correct fuel level. By ‘tight’, I mean within +/- 1/16" for a small carb like this.

Also, I have no idea what condition your float was in prior to re-coating. If it had absorbed fuel, it’s still going to be heavier than spec, and as such, setting the fuel level too high. If you can easily adjust the float to a lower level, do it – move it by 1/16" or so, and see if it changes the behavior.

BTW, how does the motor run otherwise? Is it rich, lean or seem to be A-OK?

The Ace has a valve lift of 1/8" and and the fuel level is 23/32" from the top of the bowl to the gas level if that helps

Kev