Curable coating compositions having improved compatibility and scratch and mar resistance, cured coated substrates made therewith and methods for obtaining the same

A method of obtaining a cured film having improved scratch and mar resistance, the method comprising

• applying a coating composition to a substrate to provide a coated substrate, said coating composition comprising
• (A) a film forming component comprising
• (a) one or more active hydrogen containing components, and
• (b) one or more curing agents comprising at least one aminoplast resin (bi) having from 0.5 to 3.5 moles of NH per mole of aminoplast resin (bi),
• (B) a blocked acid catalyst having a blocking agent which is not a tertiary amine, and
• (C) a tertiary amine present in an amount equal to 30 to 100% by weight of the blocking agent, and
• thermally curing the coated substrate to provide a cured film on the substrate.

A method of making a multilayer coated substrate having a substantially unwrinkled appearance and improved scratch and mar resistance, comprising

• applying a first coating composition to a substrate to provide a first coated substrate, said first coating composition comprising a tertiary amine, and
• applying a second coating composition to the first coated substrate to provide a second coated substrate, said second coating composition comprising
• (A) a film-forming component comprising
• (a) one or more active hydrogen containing compounds, and
• (b) a crosslinking agent comprising at least one aminoplast resin (bi) having from 0.5 to 3.5 moles of NH per mole of aminoplast resin,
• (B) a blocked acid catalyst having a blocking agent which is not a tertiary amine, and
• (C) a tertiary amine present in an amount equal to 30 to 100% by weight of the blocking agent, and
• curing said second coated substrate to provide a multilayer coated substrate having a substantially unwrinkled appearance.