I know you have to degloss them and also apply stain kill. What else do you have to do to make sure the (lighter) paint won't get jaundiced? In the past, I've stripped using heavy-duty stripper, a heat gun, and sander. To put it mildly, this did not work. Within days of painting the refinished wood with quality semi-gloss, brown patches would appear, and in a month, the entire (white) wood was light tan.
Any help or referral to links appreciated.