Do they
01) Strip off old paint?
02) How many layer of primer
03) How many layer of paint?
04) Clean up after paint?
05) Do they seal all old holes?

This post has been edited by weikee: Aug 15 2011, 01:34 PM

To me yes especially the old paint have sign of peeling.

If you plan to use gloss paint, skim coat is a must. Else you see lots of wave. If your wall are precast (mostly on highrise) maybe no need, most precast wall are very straight.

Like my house, even if i plan to use normal matt paint, the original wall so bad, end up have to do Skim coat.

Sealer is better for new wall, is cheaper too. One layer of sealer is cheaper than paint.

If it did not specify sealer or primer is not a sealer.