paint
squeegee and stick
So ...put pantry panels on workshop bench..waited for dust to settle overnight...gave a light sand each panel and wiped clean..then out with big squeegee and a stick..used stick to dribble paint all over panel 1...then squeegee spreading paint over surface...learning how much to dribble on panel 2..learned not to be mean with paint..by panel 4 it was good..pleased with finish..very little waste...very quick clean up.
Suggest trying on small panel with small squeegee first. No good unless working on flat!!!