Can I use just acetone to cleanse the nail plate before a service?

It is best to us the cleanser recommended by the brand you are using. Ideally, this should be a mix of both acetone and IPA (isopropyl alcohol) as they each remove different types of oils. They will also temporarily dehydrate the surface of the nail, making sure the nail plate has no oils nor water on its surface that will interfere with good adhesion of any nail coating.

IPA without acetone is best for cleaning the nail after any coating has been applied as acetone can start to break down any coating.