Didn’t know where to post this so imma just go ahead and slap it here as the ski in question are Stockli.
Have a look at this and tell me if it is normal:
View attachment 184315
What causes these lighter spots? I mean I know what they are but why are they visible like that? Bases too thin already or what?
Other possibilities:
(Too hot a wax job can cause swelling in a tab-revealing pattern, that by itself isn't a problem, usually.)
What's a straight edge show you with those?
If those are a regular pattern of scuff areas, are they - and the edge - higher than the larger base ptex area closer to the center?
If so, that may be part of what's happening: slightly edge high, in those areas, causing greater friction towards the edges,
with an additional uniform irregularity from the tabs? This is very common with the big machine tunes -
just slightly edge high with great uniformity of shallow curve.
If this is so, very slightly, and there are no symptoms of edge high behavior in the ski (that is detrimental), then no problem, very likely.
If not slightly edge high (again, like many big machine base flatteners tend to cause just slightly), then maybe lots of on-edge carves are subjecting/sinking the edges/base nearby into the snow/crust friction more, and causing that greater wear from resulting friction (plus some mild swollen tab phenomena);
Or, last alternative, less likely, maybe carving on edge force has moved the tabs a bit, lifted up those scuff areas with the edges, relatively, just slightly as you carve, enough to scuff that wear pattern over time. (I doubt this, actually.)
When you put hot wax on those bases and scrape it, are you getting a similar wax retention pattern early on?
(With most of the inside ptex scraping off slightly later? And in the same "tab" pattern?)
(A good hot wax job would surely make those lighter areas soak up wax enough for a uniform color, until the wax wears off.)
In some ways, this pattern of dryness may practically act just as an early warning system that you are due for a good wax job.