After completing the first base, apply powder to a puff and apply a thick layer to the areas you want to cover.
After that, if you cover it once more with a first base product, it covers twice as well.
If you follow this method, blemishes that wouldn't cover no matter how much you layered them are truly perfectly concealed. However, since the process involves continuously layering in the order of base > powder > base, the base may become thick. I recommend covering only the localized areas you are concerned about.
TIP. Bright shades of powder can look cakey, so use a color that is half a tone to a full tone darker.