"Or is standard plumber's putty fine for Acrylic?"

It may cause an ever expanding oil stain.

Thanks, us DYI'ers need a big warning. I just happened to read the container of PP, a container I've had for a number of years... guess I was "smart" enough to read because of the new counter top material.

You did better than the Disney Hotel in CA.

They had nice marble vanities in each room, with a huge oil spot coming from the putty under the faucet.

It had been in so long the spot extended a good 6-8 inches from the faucet.

Even the public restrooms had the problem.

You can use Sta-put Ultra.