The Dunbar tour pro followed up his outstanding seven-under-par first round of 64 with a more pedestrian two-over 73, for a total of five-under 137.
The runner-up was Stephen Gray with scores of 69 and 72 for 141. He received a cheque for £4,570. Graham Fox (Clydeway Golf) was third on 143 (74-69) to earn £4,000
Fenwick never replicated the form which he had found on Monday. A double-bogey six at the 12th and another six at the 18th took the shine off birdies at the third, fourth, fifth and 13th – but he did have two birdie twos to add to the five he had in the first round.
Gray’s winning chance was torpedoed with mid-round bogeys at the sixth, ninth, 11th and 12th. Fox had six birdies but had a double-bogey six at the 13th and also shed single strokes at two short holes, the sixth and 15th. Paul Lawrie finished fourth with a pair of 71s for 144. He ran up a triple-bogey seven at the 17th hole.