As has been told, yes you can.
But IMHO, you don't want to

(This is just personal experience, don't take this for granted!)
Skrox/krink are very very good in theory, but on the table I find them underperforming.
The skinks are just sooo easy to kill. If you ever fight something with reasonable Static Combat Resolutino (SCR), that is 3 or more, you will find yourself hardpressed to win. Kroxigors don't cut it anymore, with S6 they aren't as threatening as before...skinks perform nothing but die. And your scar-veteran then has to make up with a wound or 2.
On the charge, a(ny) Skrox unit is very deadly. When charged, just don't look when your opponents rolls the dice...
They're great fun, to play with and against (opponents LOVE killing skinks!). But, only the Old Ones know why, I cannot put them to good use.
Also, I like my units to look neat on the battlefield. No mud, no messing around, no jokes or other animosity....And rank up neatly! Skrox+mounted scar-vet has 3 different base sizes. Might look awkward, that is only if you care about it
I have read stuff that people are using Skrox to great effect, I find them somewhat disapointing. We have Saurus you know...
The hunted