Jacques is right, as is Mojo23.
Butter and Rocket (regular and Race) can be considered rub-on's and do go "over" scraped and brushed hot waxes you normally apply; so they are indeed overlays by definition. But you mentioned the Q5, Q6 and Q7 series. Since the Q series are pure fluoro blocs that have unsurpassed wet friction release properties (aka capillary friction release) they are not what one would use in cold dry snows for best performance since there is not much moisture (wet) friction to help reduce and, in this case, would also be costly to use when they are not needed.
BTW the Q series is for competition; however, if your race is to be the first one to the powder, there might be those keen to win that competition and would use Q products (within their appropriate range) for... ahem, pleasure.
There are anti-stats additives in the Q5 and Q7 blocs to help address static friction in new and old snow (Q5 is for New Snow and Q7 is for Old Snow) but many competitors and technicians simply use Q6 -- which does not have an anti-stat added -- for all conditions within the Q series range and many times they will rub Race Rocket New or Old Snow (or even Butter) and then Q6 and rub in together to get a similar anti-static effect.
Also, to add to the benefit list of anti-static additives, it is important to know that static charges attract dirt particles as you glide and a base waxed with just clear wax (meaning red, blue, white or Lime from any manufacturer) will absorb dirt and pollen (from the nearby trees) as well as attract oil and grease (from the snow cats).
If you need graphite waxes, please look for online dealers like Race Place, Artech, Jans.com or Tognar tools and ask for Zoom Graphite or Bullet. If you are a tech head and like to mix your waxes then look for the FG series; FG07 is for brutal cold, FG77 (my favorite) is for cold and FG88 is for warmer new snows. These additives can be added (one to one is best) to any "clear" wax (within their appropriate range) to reduce static, repel dirt and keep your skis free from pollen, grease and oil accumulation.
Hope this all helps!