Part 1: An All-Over Glow
As a figure model, you want an even skin tone without any tan lines. You may not think you have strap lines unless you accidentally lay out too long. But, most everyone who goes out in the sun has uneven skin tone, especially from shoulder straps. A little unevenness in unavoidable, but for the successful figure model, head-to-toe uniformity is the skincare holy grail. If you go around in a tank top without putting sunscreen on your shoulders, you probably have strap marks. Look closely in the mirror and you'll see them.
First you should understand what causes tanning. UV rays, which are present even on partly cloudy days or in winter, darken your skin. It sometimes takes up to two days for a tan to take full effect and several weeks for it to wear off. So whenever you're outside,exposed skin is getting darker. while the skin under your clothing is staying lighter.
This is why it's important to wear sunscreen on exposed skin. The sun is especially strong between 9:30AM and 2:30PM, even if its a little cloudy. The UV rays go right through thin cloud layers. I recommend staying indoors in the middle of the day and wearing SPF 50 sunscreen when outdoors. L'Oréal and Neutrogena both make good lightweight products, but just about any brand will do. Don't forget your legs and arms if you're wearing shorts or short sleeves.