hi guys im doing a 2 tier swiss buttercream cake and i want to airbrush it and add some gumpaste deco after,can i airbrush the cake straight after taking it out from the fridge? or should i wait for it to come to room temperature?and cn i put the cake back into the fridge after airbrushing n also cn i add gumpaste deco on top of the airbrush...pls guys really need some help...thanks