We have some interior trim that was painted using latex paint 15 years ago. Now we want to paint it with oil-based paint.
The kid at the Sherwin Williams store says, "No problem. Just paint the oil-based paint over the water-based."
On the other hand, a friend who does a lot of painting says I should use a water-based primer under the oil paint.
The guy at Home Depot says I could paint the oil-based right over the water-based but, it would be better if I used a primer, which could be water-based or an oil-based primer .. it doesn't matter.
Who's right ?