Rob Taylor's twin strikes reduced Namibia to 59 for 2 in 12.1 overs when play was stopped after Scotland posted 279 for 9 in 50 overs.
Matt Machan rose to the occasion by scoring swashbuckling 61-ball 78 to set the platform for a strong total. At one stage, Scotland appeared to be running away with the game as Matty Cross and Machan counter-attacked. Cross fell for 27, but Machan continued to play freely, smashing nine fours and a six in his knock.
What looked like a 300 plus total at one stage was somewhat stemmed by Bernard Sholtz, the left-arm spinner, who picked up three vital wickets in the middle. But Richie Berrington, who made 51, resurrected the innings along with Preston Mommsen, the captain (46) and Freddie Coleman (32) to finish strongly.
Stephan Baard, the opener, raced away to 28, but the wickets of Louis van der Westhuizen and Sarel Burger, the captain, pegged Namibia back. At 39 for 2 in 8.3 overs, it needed a partnership of substance to entertain thoughts of victory. The third-wicket pair had added 20 when the players were forced off the park.
With a victory in two outings so far, both Scotland and Namibia are still in with a chance of securing a berth for the 2015 World Cup to be held in Australia and New Zealand.