Any cream concealer should always be applied over liquid foundation. If you put it on first, it simply rubs off when you apply the foundation.
A LITTLE GOES A LONG WAYProfessionals keep concealer light and minimal. Only use it where you absolutely need it and make sure that the colour blends perfectly with your skin tone. If the colour looks like it's sitting on the surface of your skin try tapping it in with your fingers.
BANISH BLEMISHESUnder eye shadows can be blended away simply by pressing on Erace concealer. Blend into the inner corner of the nose and at the outer corner of the lid, using your ring finger. Add a little around your nose, over your eyelids, in fact anywhere you need a little extra coverage. Just ensure that you blend it in well.
Blemishes can be covered by applying Erace accurately with a tiny brush. You can also blend it in using your finger.
JUST A LITTLE EXTRAAdd powder after applying concealer. If you need to cover the blemish even more you can put another layer of concealer over the powder, just make sure you don't 'build up' concealer, as this will make the blemish even more obvious.
More tips:
Foundation | Concealer | Powder | Blusher | Your Face Shape