Hi Liz! Long-time lurker, first-time asker:)
So, I followed your tips on how to create a flawless base, I think I got the steps right, because I'm satisfied with the look I've achieved. I even checked it in natural light (OC!). But when I start contouring the blemishes resurface and darken, it's like they take up the pigments of my blush and contour. Wrong choice of concealer kaya? Thanks! - Tin
Hi Tin! This is an excellent question. It could be the concealer but it's probably your application technique. To prevent your painstakingly-painted base from being erased once you start brushing on color cosmetics, just pat or bounce your brush! Swiper, no swiping! (Yes I went there.) Just use a small amount of product for your first layer since patting it on increases its intensity on your skin.
Don't rub the bristles on either. Just sort of bounce the brush in quick patting motions while going upwards to your hairline. This way, your foundation/concealer/powder will just be pressed onto your skin, instead of coming away with the brush.
Bounce it like you mean it
It will take a bit of practice but you'll soon get the hang of it, I'm sure! Here are a couple more additional tips to keep your base in place.