dear amir bhai
no doubt u have very good product in hand but theoraticlly its for leather and contains more oils / waxs so i afraid on dash application it may attract more dust, ( you can see picture on bittle also showing car leather seats and not dash ) so keep it safe for ur home leather couch
and buy mothers dash interior
.
since u already spend money on turtle gell so may be u try to apply less qty of gell and wipe off with very light hands so its stronger cleaning agents dont hurt ur dash surface
in coming days going to have meet with umair bhai than will check his ice interier spray results on my "testing" alto's dash 
by the way nice to know another amir bhai , Mashallha both amir bhai's are best in detailings:)
so bhai gee whats ur next plan for lahore and gajar ka hallva ?