If you mean how to prep oily skin before makeup, try this:
- Cleanse with a gentle foaming or gel cleanser.
- Use a lightweight moisturizer — preferably oil-free/non-comedogenic.
- Apply sunscreen (SPF 30–50), ideally a lightweight gel or matte formula.
- Wait a few minutes for skincare to settle.
- Use a mattifying primer mainly on your T-zone and other oily areas.
- Apply foundation in thin layers rather than one heavy layer.
- Finish with a little translucent setting powder where you get oily.
Tip: Don’t skip moisturizer because your skin is oily. Over-drying can sometimes make makeup look worse and feel greasy later.