Want to really make things easy for touch-up tuning? Then all you need is:
- Deburring/Carborundum stone
- Moonflex stone - 100 grit
- Side edge angle guide for your chosen angle (no multi-tools please)
- Swix CH4 universal liquid wax
- Wax brush (horsehair + bronze/brass combi works well)
Your job is to sharpen the edges and wax the base.
If there is any edge damage use the deburring stone to knock out the jagged edges of the damage. Don't use the Moonflex for that work (that's great way to kill the Moonflex stone).
Sharpen the edges using the 100 grit moonflex stone and the side edge angle guide. Note that I'm not recommending the use of a toothed file as they require care for both their use and maintenance that you don't have to worry about with the Moonflex. 100 grit will make quick work of the side edge without removing a ton of material. No, it won't leave it mirror smooth (you need to follow a progression of finer grit Moonflex to do that), but this is the quick and easy version of tuning. Never file the base side of the edges (although you might need to fix some damage with the deburring stone).
For waxing, wipe down the bases with a towel to remove any dust/dirt from the previous steps. Use the combi wax brush from tip to tail to open the structure before applying the wax. Apply the liquid wax generously over the base using the built-in applicator; leaving a very thin coat. Once the wax is dry, brush it out with the combi brush to open the structure again.
This is a "good enough" for recreational use quick and easy tune-up. It's not a substitute for a shop grind (at least once per season), machine edge work, and hot waxing. Skis should be hot waxed a few times depending on how often you use them. The quick tune-up wax doesn't last as long as a good hot wax job, but it's cheap, fast, and easy. One 100ml bottle of Swix CH4 lasts me an entire season (60-75 ski days) when mixed in with a few hot wax jobs.
Note that I'm not a "wax weenie" when it comes to how fast my skis run. I could care less as I'm not racing and I just want the skis to move smoothly over the snow without sticking.