Coleman scored two tries in the first half as the Whites cruised to a 45-18 win at Viking Park.

The 27-point demolition means the Whites will play against Royals in the preliminary final on Saturday. The winner advances to the grand final against two-time defending champion Tuggeranong.

Coleman put in a star performance at flyhalf just three days after arriving back in Australia following the ACT Brumbies triumph at the world club sevens in London.

Coleman was so jet-lagged he took a long nap on Thursday and slept through Queanbeyan's last training session before the clash with Wests.

But the unsettled preparation did little to disrupt Coleman as the Whites edged closer to a grand-final berth.

''I made a rookie mistake and fell asleep at lunch on Thursday, so I had a seven-hour afternoon nap and didn't make it to training,'' Coleman said. ''The guys at Queanbeyan make it easy to slot back in. If we can deliver our best performance, there's no reason why we can't go all the way.

''After [Sunday], I don't think we played our best football and if we do get our best going, I think we've got one of the strongest teams in the comp.''

Queanbeyan coach Adam Fahey had the luxury of giving some of his stars a break.

''The score didn't reflect the game, we didn't execute as well as we would have liked and we've got a lot of improving to do if we want to mix it with Royals next week,'' Fahey said.

Wests coach Craig Robberds lamented inconsistent performances that cost his team a chance at grand-final redemption, having lost the past two to Tuggeranong.

''It would have been nice to have another crack, but Queanbeyan were big, strong and physical and Robbie Coleman added the class,'' Robberds said.