Linda, you need to use the faster setting powders really. I use EZ
Flow, their pastel flower collection is ideal for 3D flowers. Take a tiny, dry bead and place it on the nail. Flatten it out slightly and dip the tip of your brush into the centre of the petal, draggin it out slightly to get the shape. Repeat 5 time in a circle and place a tiny ball of acrylic in the centre of the flower.