Toyota Carina E - Idle control valve - Gregory II

On removing the throttle control valve for cleaning, would I be wrong in appling a smeer of copper ease around the gasket on re-application? I will torque the bolts correctly as per the manual. Also, can WD40 be used as an alternative to carb spray in cleaning out the valve, or may this cause more problems? Thanks guys again. Greg

Toyota Carina E - Idle control valve - Gregory II

Would copper grease do the seal any good, or would an alternative gasket sealer be more suitable for this purpose?