Possible Clues:

• Paint Dean Court ground
• First layer of paint
• Painter's work that's rarely seen?
• First paint layer
• Painter's work meant to remain unseen?
• Nether garment that's put on by painter
• ... with a shirt, perhaps, to be glossed over
• If it's put there's no finish ot it
• Not a painter's top work
• The first layer of paint