Possible Clues:

• One lays it on thick with flowers at last
• Wall coatings
• Stucco and gypsum, e.g
• Smears -- they're often seen on children's knees
• Bygone bandages
• Bandages, to Brits
• Places a smooth surface on a wall
• Covers place with flowers
• Overspreads
• Daubs a number of stickers round