Related Clues:

• Bath additives
• They can be essential
• Rembrandt creations
• Artworks
• Some Picassos
• Hangings at The Frick
• Masseur supplies
• Some museum hangings
• Art medium
• Palette choices
• Does routine engine maintenance
• Stops squeaking
• Rembrandt's output
• Tends to a squeak
• Some are essential