We purchased a wonderfully white painted cinder block building, only later to find the paint begin peeling. They had put a coat of latex over the old oil paint. Should I power wash off all of the latex or is there a different way? I assume it is best after getting the latex plaint off to paint with oil?
Power washing is the best way to remove the loose coat of paint. Not all will come off but I suspect most will. After preping the cinder block all you need to do is prime with a good oil based primer and repaint with a good acrylic paint. Priming was the missed step that led to the failure you are experiencing.
* Using a power washer isn't easy. Be careful if you decide to do it yourself.
* If you don't already own a power washer you can rent one. Only buy if you think you will need it for other chores.
* Check with your local paint store for a good exterior primer. You could also use a good acrylic primer, like Zinsser 123, but an oil base will stick for sure.
* Go to a real paint store for your primer and paint, not a hardware store.