Modifiers matching coating:

• metal,
• protective,
• biological,
• organic,
• colored,
• new,
• liquid,
• outer,
• specified,
• permanent,
• conventional,
• nonconductive,
• reflective,
• thermoplastic,
• decorative,
• clear,
• thick,
• opaque,
• old,
• traditional,
• optional,
• secondary,
• industrial,
• brittle,
• popular,
• bituminous,
• overlying,
• temporary,
• corrosive,
• visible,
• modern,
• alternative,
• polymeric,
• frictional,
• hydrophilic,
• reactive,
• slippery,
• external,
• interior,
• metallic,
• friendly,
• preservative,
• ordinary,
• refractory,
• thicker,
• impermeable,
• appropriate,
• waterproof,
• color,
• chemical,
• tough,
• abrasive,
• stubborn,
• magnetic,
• expensive,
• insoluble,
• inorganic,
• black,
• resistant,
• durable,
• heavy,
• internal,
• specialized,
• optical,
• exterior,
• indoor,
• pearlescent,
• thin,
• plastic,
• supplementary,
• impervious,
• common,
• nontoxic,
• fine,
• topical,
• advanced,
• viscous,
• hard,
• special,
• difficult,
• suitable,
• over,
• top,
• base,
• transparent,
• synthetic,
• environmental,
• unwanted,
• sensitive,
• marine,
• smooth,
• conductive,
• porous,
• architectural,
• additional,
• dark,
• ceramic,
• standard,
• soft,
• functional,
• loose,
• uniform,
• wet,
• miscellaneous,
• fragile,
• nonmagnetic,
• relevant,
• glossy,
• aesthetic,
• natural,
• solid,
• nonstructural,
• nonmetallic,

Simple categories matching stubborn:

• stain,
• soil,
• imperfection,
• dirt,
• impurity,
• contaminant,
• item,
• discoloration,
• animal,
• substance,
• deposit,
• residue,
• material,
• infection,
• condition,
• coating,
• disease,