A dyson would certainly do some major damage to your model.
You could use an air duster (tin of compressed air) but that again might be too powerful.
Think the best solution would be the type they make for cleaning computers and keyboards. They tend to be battery powered, sometimes USB, so less suction to do damage. Some have various extension nozzles as well.
Amazon have something listed as below (BUT PLEASE REMEMBER THIS IS NOT AN ENDORESMENT OF THIS PARTICULAR SITE AND YOU ARE LEFT TO SEARCH OUT OTHER SUPPLIERS AND BEST PRICING)
http://www.amazon.co.uk/s/ref=nb_sb_ss_c_0_12?url=search-alias%3Daps&field-keywords=computer+vacuum&sprefix=computer+vac%2Caps%2C963
Hope this helps.
Happy Modelling
BUILDING: Hachette Spitfire Mk 1A, Constructo Mayflower
SUBSCRIPTION COMPLETE (Awaiting building): USS Constitution, Sovereign of the Seas, 1:200 Bismarck (Hachette)
COMPLETED: Porsche 911, E-Type Jaguar, Lam Countach