What is the best course to acquire scratch out of a white porcelin podium sink? ...

Gas sea boiler pilot will street lamp. When...
Answers:    There is no real channel to get scratch out of a porcelain fixture.

The Epoxy Enamel suggestion is probably the best idea if the scratch are small. The epoxy enamel is a paint that has the faculty to adhere to the porcelain contained by a very strong course, thus allowing the painted area to be cleaned in need coming off the surface.

If nearby are lots of scratches later you might want to consider resurfacing though my experience with that have been highly poor.

I don't bother with covering scratch. There is one way to minimize the appearance of small scratch: bleach the surfaces, rinse thoroughly, allow to dry. After it is dry, use furniture polish on the scratched area.

Hope this help.
What happen if I apply grease paint over...
forget it. you can try epoxy enamel