In reply to G. Tiger, Esq.:
ah, yeah...
so not real skis, but approach skis.
there are not better commercial version available (e.g. OAC or re-bagged BD skin based skis...), which are really great (except the binding doesn't work with stiff soled ice climbing shoes... they require that the sole/boot flexes at the ball of feet).
So to fix you skis... in order to do it properly... you need to first unscrew the bindings off. Then make a mold of the ski profile (both top and bottom, that pretty much matches the profile of it). Old 2x4s screwed together will work just fine. Ideally you would want a pneumatic ski-press... which can be hard to do... you can sort of diy-rig something like that. Simple get some old firehose from your nearby firestation, and close both ends so that it is still semi full air (if you can rig a bike/car valve to it, so that you can inflate/deflate it). Oh, and you'll also need a lot of woodworking clamps, perhaps some tie-straps... big injection needle, slow cure marine grade epoxy (cure time 24h +), rubbing alcohol, heat gun, a can of beer, tea candle, packing tape...
Start by assembling the ski press...
1. With the packing tape, tape the bottom "jig".
2. Fit the ski in the jig.
3. Add the hose- "bladder" thing on top of the ski.
4. Add the top "jig".
5. Add clamps and test that when you screw the tighter (you can also use some tie-straps if you don't have enough clamps), the "bladder" adds even pressure on the ski (pressing it against the bottom of the jig). Note, if managed to get a valve on the bladder --> instead of using the clamps for pressure, you can just pump the bladder to be more full...
If so, you now got a makeshift skipress... well done.
Now unscrew the clamps/empty the bladder.
Now you need to prep the ski.
6. Clean the ski with isopropyl alcohol (rubbing alcohol).
7. Mark all spots where you need to add glue (unless it was a complete delamination... in which the whole base delaminated... then skip this step).
Now you need to prep the epoxy....
8. Open and consume the beer (you can actually do this ealier.. e.g. while making the jig and bladder).
9. Invert beer can and cut a hole on the side so you can fit the small tea-candle inside.
10. Mix the epoxy properly (you got the 2-component one, roight)
11. Light the tea candle and pour the mixed epoxy on the "cup" on top of the beer can. You can use the heat gun to make the epoxy flow easier.
12. Add warm epoxy into the ski (if partial delamination, using the injection needle... if complate delamination, then with a mixing stick etc. on the whole ski-base). Oh and try to keep the skibase warm with the heat gun (or the spots where you need to add the epoxy).
13. Once all spots requiring epoxy are flowing with it, place ski in the jig. Note, if complete delamination... be very precise and perhaps add a beforehand a few small guide-nails etc. to keep the skibase and other layers in line.
14. Re-assemble the full ski-press like you test-fitted in steps 3-5.
15. Keep jig in reasonably warm place, and wait some 24h.
16. Redo for the other ski.
17. Screw the bindings back on... use a bit of epoxy in each hole (again, add heat with heat gun, so it goes into the holes).
18. Enjoy your gear...
Feel free to modify these as you see fit... Also google ski-building etc. to get more ideas.