I am repainting a bathroom that includes trim with a high gloss. The house is old (1924) and the existing paint may have lead in it. There was a remodel in the '80s, but I can't guarantee the current paint was applied then.
My local paint store advised against sanding to take off the gloss, because of the lead risk. They recommended a "liquid sandpaper" product which I applied. However, the first coat of the new paint did not stick (I've been stripping it back off for the last couple of weekends). The paint store also advised I did not need a primer, which I now believe was a mistake.
How can I get the new paint to stick to the old?