I usually wax after every couple days of skiing or so. It's a good way to relax the night before skiing. Nothing like scrapping wax and having a couple beers.
I usually run my fingernails from side to side across the base.
If I feel, very distinctively, the small pores in the base, it's time for a wax. A freshly waxed base you wouldn't be able to feel the pores very well only because they have absorbed wax.
I try to wax every time I shred, but if I'm lazy I'll wax like every 2-3 times.
Good to know!
I guess my method has been somewhat flawed. Just try to wax every 2-3 times you ski max :)
+k to you sir.