So I frosted my cake this morning, but I had never heard of a crumb coat until now. My cake is fully frosted, but covered and crumbs and uneven.. very obvious because my cake is blue and pink and the icing is white. I need a smooth surface, but I do not have time to take all frosting off and do it again. Will it be ok just to melt chocolate down to coat cake with so it is solid and smooth? Help!