A coating composition comprising: A. an acetoacetate-functionalized unsaturated polyester comprising the reaction product of: I. an unsaturated polyester in an amount from about 50 to about 97 weight percent, based on the total weight of and, comprising the residues of: a. a hydroxyl component comprising: i. 2,2,4,4-tetramethylcyclobutane-1,3-diol (TMCD) in an amount ranging from 10 to 90 mole%, based on the total moles of (i), (ii), and (iii), ii. a diol other than TMCD in an amount ranging from 10 to 90 mole percent, based on the total moles of (i), (ii), and (iii), and iii. a polyol in an amount ranging from 0 to 50 mole percent, based on the total moles of (i), (ii), and (iii); b. an α,β-unsaturated carboxyl compound; c. hexahydrophthalic anhydride (HHPA); and d. optionally a third carboxyl component in addition to (b) and (c), other than said α,β-unsaturated carboxyl compound and said HHPA wherein said optional third carboxyl component is a polycarboxylic acid compound, a derivative of polycarboxylic acid compound, or a combination thereof; and II. an alkyl acetoacetate and/or diketene in an amount ranging from about 3 to about 50 weight percent, based on the total weight of and; and B. a basic catalyst. A. an acetoacetate-functionalized unsaturated polyester comprising the reaction product of: I. an unsaturated polyester in an amount from about 50 to about 97 weight percent, based on the total weight of and, comprising the residues of: a. a hydroxyl component comprising: i. 2,2,4,4-tetramethylcyclobutane-1,3-diol (TMCD) in an amount ranging from 10 to 90 mole%, based on the total moles of (i), (ii), and (iii), ii. a diol other than TMCD in an amount ranging from 10 to 90 mole percent, based on the total moles of (i), (ii), and (iii), and iii. a polyol in an amount ranging from 0 to 50 mole percent, based on the total moles of (i), (ii), and (iii); b. an α,β-unsaturated carboxyl compound; c. hexahydrophthalic anhydride (HHPA); and d. optionally a third carboxyl component in addition to (b) and (c), other than said α,β-unsaturated carboxyl compound and said HHPA wherein said optional third carboxyl component is a polycarboxylic acid compound, a derivative of polycarboxylic acid compound, or a combination thereof; and II. an alkyl acetoacetate and/or diketene in an amount ranging from about 3 to about 50 weight percent, based on the total weight of and; and I. an unsaturated polyester in an amount from about 50 to about 97 weight percent, based on the total weight of and, comprising the residues of: a. a hydroxyl component comprising: i. 2,2,4,4-tetramethylcyclobutane-1,3-diol (TMCD) in an amount ranging from 10 to 90 mole%, based on the total moles of (i), (ii), and (iii), ii. a diol other than TMCD in an amount ranging from 10 to 90 mole percent, based on the total moles of (i), (ii), and (iii), and iii. a polyol in an amount ranging from 0 to 50 mole percent, based on the total moles of (i), (ii), and (iii); b. an α,β-unsaturated carboxyl compound; c. hexahydrophthalic anhydride (HHPA); and d. optionally a third carboxyl component in addition to (b) and (c), other than said α,β-unsaturated carboxyl compound and said HHPA wherein said optional third carboxyl component is a polycarboxylic acid compound, a derivative of polycarboxylic acid compound, or a combination thereof; and a. a hydroxyl component comprising: i. 2,2,4,4-tetramethylcyclobutane-1,3-diol (TMCD) in an amount ranging from 10 to 90 mole%, based on the total moles of (i), (ii), and (iii), ii. a diol other than TMCD in an amount ranging from 10 to 90 mole percent, based on the total moles of (i), (ii), and (iii), and iii. a polyol in an amount ranging from 0 to 50 mole percent, based on the total moles of (i), (ii), and (iii); i. 2,2,4,4-tetramethylcyclobutane-1,3-diol (TMCD) in an amount ranging from 10 to 90 mole%, based on the total moles of (i), (ii), and (iii), ii. a diol other than TMCD in an amount ranging from 10 to 90 mole percent, based on the total moles of (i), (ii), and (iii), and iii. a polyol in an amount ranging from 0 to 50 mole percent, based on the total moles of (i), (ii), and (iii); b. an α,β-unsaturated carboxyl compound; c. hexahydrophthalic anhydride (HHPA); and d. optionally a third carboxyl component in addition to (b) and (c), other than said α,β-unsaturated carboxyl compound and said HHPA wherein said optional third carboxyl component is a polycarboxylic acid compound, a derivative of polycarboxylic acid compound, or a combination thereof; and II. an alkyl acetoacetate and/or diketene in an amount ranging from about 3 to about 50 weight percent, based on the total weight of and; and B. a basic catalyst.