You can thin it slightly with a little water if needs be. if you just want a little for a 'wet' eye look then you should be able to brush it on with a paint brush. Normally you pipe it on but you can also use a pallet knife.
Hi, I am making an eyeball cake for a Halloween party and have bought some piping gel to put over it, to give it that watery glazed eye look! However it seems very thick and despite looking I cant seem to find proper instructions on how to actually get it spread over my cake (which is basically a sponge cooked in a pyrex bowl covered in fondant icing)...can anyone help?