Painting new breeze block x need to “mist” it first?

[steveatesh]

Son wants to paint the walls of a brand new garage with white emulsion. The walls are made of breeze block, or those large grey square blocks with a rough surface, whatever they are Called.

Would it be best if he uses a watered down paint first as you would on new plaster?

Cheers in advance.

[steveatesh]

Cheers Rich