Initially I wear my white sunhat
all the time whenever I go outdoors in late Spring so that my "
chrome dome" doesn't get sunburned, but then as the days get even warmer, I alternately take off the hat and then put it back on a few minutes later, in an effort to summerize my scalp;
eventually when I get a fairly even tan "up there", I can leave my hat off for hours at a time without excessive reddening.