I use ColorScience primer and sunscreen. I would like to incorporate your products to combat brown spots and overall aging.

http://www.colorescience.com/category_s/108.htm

Is waiting for 30 minutes after the TriReduction and Squalane oil in the AM sufficient before applying the primer and sunscreen powder (sunforgettable)? They are made of micronized titanium dioxide and zinc oxide, both high content. I've been very happy with their products.

I am a professional who works with government officials and light amount of make-up is a must.

Would the biological oil or maybe DayCover cream create a sufficient barrier between the copper and micronized titanium dioxide and zinc oxide?

I just absolutely love the Colorscience line of makeup!