I am about to paint the trim in my stairway.. It has 2-3 coats of paint. I know the top coat is a latex paint, and the bottom is lead paint.. I did a swab test and found it out.
What would be best after washing down with a non-soapy detergent- a light sanding, or using liquid sandpaper? I am going from a medium blue to a bright semi-gloss white. Would priming be necessary?