The tanks were actually engaged by the RSDG's Challengers not Scorpions. So no embarrassment factor at all. Yes we did engage with 30mm and they did bounce off, but the enemy sight systems were destroyed leaving the tanks useless.
In 1992 we (16/5th) were the last British troops to fire the 76mm prior to deployment to Belize. The 76mm Scorpion was taken out of service not long after due to toxicity problems within the turret.