I used foundation as sunscreen for years and it did, as far as I can tell, a pretty good job of it. I was allergic to the chemical ones available here. The mineral ones were like clown paint. Eventually the mineral sunscreens got better, that’s what I use now. But no I don’t think “makeup” generally ages your skin. Anything that puts a layer between your skin and the sun and car exhaust, probably more helpful than harmful.