A brick chimney is masonry, and like all brickwork, it is porous. That means it will soak up paint readily and makes an ideal surface to be painted. Types of primer for painting as like:
Clean the brick before painting
Spread a drop cloth around the base of the chimney.
Paint the chimney with a primer.
Paint the chimney with a finish paint.
painting and straining
NO! An exterior rated primer must be used. Plus, choose a primer that is recommended for the surface you plan on painting.
Sounds like it's worth trying, -good idea .
The answer is GESSO, which is a base or primer used in painting.
"Drywall primer" -Yes, -it's called exactly that -right on the can !
Depending on what type of spackle you are using and how thick it was applied it may need to dry longer, but you also need to prime the spackled area before painting. My experience has been to use an oil base primer and any type of paint can be used over it, oil primer works well for a bathroom.
percussion
It's Chimney sweep dance
Because it will avoid problems withold oil-based paint (you ABSOLUTELY need a primer over an oil-based paint before painting with water-based/acrylic pain)patches made of different material (patches of plaster for example) that would react differently from other parts of the wallbare surfaces (new walls) which won't give good adherencecolour changes (if painting over walls of different colours, the result will look different with the first layer(s) of paint. The primer can help)
As long as the surface is clean and dull, then either an oil or acrylic primer can be used to cover oil-based paints.
Spray painting
Yes, or it will take a lot of paint due to the fact that the osb will soak it up.