Leading on nine under par at the half way stage, Stuart Easton finished with two successive rounds of 70, one over par, to post a final total of 269, seven under par for the championship.
Jack Broun (Turnberry) concluded with two level par rounds of 69 for a four under par total of 272 and a share of seventh place.
Ruben Lindsay (Ayr Belleisle) finished in 12th place overall with a one under par total of 275, following a third round of 70, one over par, and a concluding round of 67, 2 under par, which included four birdie twos during the 18 holes.
The other Ayrshire player to make the cut, Sandy Buchanan (Prestwick St Nicholas), faded over the closing two rounds, carding rounds of 75 and 77 for a 16 over par score of 292 for the tournament.