Q: I have a popcorn ceiling that has been stained a rust and oil color when a cast-iron pipe leaked. The ceiling is more than 40 years old but is still in perfect condition. I don't know whether asbestos was included in the ceiling material.
My questions are:
1. Can I use a stain blocker primer on these stains before a color coat that matches the popcorn color?
2. Should I apply the new paint with a brush, roller or sprayer?
3. How do I cover the stain without brushing off the popcorn material?