Silk Naturals

Does anyone press their foundation? I would like to do this, but I'm worried about affecting the color or finish of the product.

I have not pressed the Silk Naturals foundation specifically, but I have pressed various others. One thing that seems to happen is the more matte it is, the more solid it will be when pressed. I like to use fractionated coconut oil, but find that with matte foundations it is best to not even use any binder or maybe use just like one drop. Even if the foundation is more of a glow finish I would only use like a drop or two as well since foundations are never truly pearly or shimmery in finish. Then I use rubbing alcohol to get it wet(it will all evaporate out) and press.
One thing that may happen, and often does, is when the foundation dries it will get cracks in it. Usually this is more of a aesthetics problem(but sometimes the cracks get worse with time and I have to re-press it down the road), and I do not mind it. I have not noticed the finish or color being affected.

It will most likely affect the color if you press it. I suggest going a little lighter if you try it, and press in small amounts at first.

Usually, when a foundation darkens on your face, it is the oils from your skin that darken the shade. If you hear about someone's mineral foundation 'oxidizing' on their face, all it really does is this mixing/darkening process. It is not a chemical reaction at all as the word they use to describe it might suggest. Since oil of some kind is usually used in pressing, you can expect at least a slight difference.