Originally Posted By: Propflux01
Actually the walls have been painted twice since the original 'contractor white' was used when built. Once with a funky dark green, then with a tan/light brown colour. you cannot see the green, but I can tell when you get to some of the edges it was there due to it being overlaid and not accurate. you have to look to see it, but it's there. otherwise you'd never know it. I just want to bring it back to the 'contractor white' because I like the garage being 'lit up' better with white. Currently the temps are not too bad, in the 60's outside and about 10* colder in garage. During the freezing tempos we had last week, it never got below about 45-50* .
If the surface is sound and there is no bleeding from water stains, nicotine, etc. you can simply apply two coats of paint. You can always prime it if you'd like, but I'd still put two coats over the primer. If you do decide to prime, Zinsser 123 primer will do the job nicely.
For the interior of garages I also prefer to use exterior paint, such as BM Moorgard. It can handle temperature swings, dampness, mildew, etc. much better than an interior grade paint can.
Don't wait too much longer as the cold weather can sometimes come on very fast.