How to paint porcelain with acrylic paint.

I don't think acrylic paint would work well on porcelain. There is epoxy paint and kits. I'm not sure what you're trying to paint, but here is a kit made for painting porcelain: https://www.rustoleum.com/DigitalEncyclopedia/product-catalog/RustOleumUSA/consumer-brands/specialty/tub-and-tile-refreshing-kit/

If you're refinishing the look of your home or bathroom, you can paint porcelain tiles with acrylic latex paint or two-part tile epoxy that mimics the look and feel of porcelain. With proper sanding and priming, both adhere well to a tile surface.

You might try Rust-Oleum Tub And Tile Refinishing it's a 2-Part Kit. I used it for my tub and it comes in a variety of colors. It will not come off !!!

The best type of paint for painting porcelain surfaces is either acrylic urethane enamel or a food-safe paint designed specifically for use with porcelain.

http://www.warriorpaints.co.za/news/articles/what-kind-of-paint-do-i-use-to-paint-porcelain-painting-porcelain-paint-techniques/

Look what I just found! They make porcelain paint pens! You have to put in the oven after you paint it. https://www.bakerross.com/brilliant-porcelain-paint-pens-5-per-pack?&gclid=EAIaIQobChMIn5TCupGu2gIVjzqBCh3NFQ9lEAYYASABEgK8OvD_BwE