abar.just giv'er a good scrub with the brush, drip some wax on, and smooth it out with the iron. Not gonna scrape unless I'm hitting chads, just let the snow do it for you
If you have sap, dirt, diesel soot, lift grease etc. on the ski base a brush alone is better than nothing.
However, with sap and grease though, you will only impregnate the stuff more with the heat.
As far as scraping and brushing goes, if the "snow" is doing that for you...........well, your wax job is crap.
Wax won't bind well to the above pollutants.
If you have a properly prepared base, which would mean clean, then base prep. wax such as Dominator Graphite Renew cooled, scraped, brushed, then followed up with the correct glide was for the conditions snow will not replace proper scraping and brushing.
Sorry, but when you need the speed to do the deed such as a jump, you need to do it well. If all you do is hit rails, then I guess you will survive.
Here is how to do it for glide speed such as needed for a slower snow jump run in.