Cover up your ugly stretch marks.
Right colour: The concealer shade should match your skin tone.
Prepare the canvas: Apply a thin layer of body moisturiser on the stretch mark. This will give the makeup a smooth canvas.
Do not rub: Use your finger tips or a makeup sponge to apply the concealer on the mark. Dab on the makeup gently, so that it blends into the skin.
Cover well: Make sure there are no visible makeup lines. Brush on a translucent loose powder across the makeup to prevent it from smearing.
Waterproof it: Apply waterproof concealers so that it stays intact on rainy days. But body makeup available is generally not waterproof.