Do you need undercoat when repainting?
Firstly, do I need to undercoat before painting.
It’s essential to use the correct primers and undercoats to allow paint to do its job properly.
Undercoat is often required to seal unpainted surfaces or prepare the surface for painting..
Do you need primer over old paint?
You probably don’t need a primer. If the current wall is smooth, clean and covered with the same type of paint (both are oil-based for example), you can head straight for the paint.
Can you put undercoat on top of paint?
5 Answers from MyBuilder Painters & Decorators first treat the knotts then use a primer/undercoat 2 coats is best then top coat of gloss. if painting wood that is already painted you can just rubb it down a little then gloss if you are using a good gloss but of course one coat of undercoat would be best first.
Can you use white paint as undercoat?
White emulsion under cream will be fine. You don’t (normally) use “undercoat” on walls. The white matt will be fine but make sure the walls are clean and free from dust. White emulsion is the correct solution.
Can I use white paint as a primer?
You should not use white paint as primer, as primer has a higher concentration of solids plus it contains an adhesive binder and acts as a sealant. A good quality primer is designed to provide the final finish coat with a better bonding surface than the bare surface itself, unlike white paint.