How should white high gloss paint be applied for maximum reflection

If wanting to use a glossy white paint as the reflection base for a "White Fusion" what would give you the most light reflection off of it?? Would you simply need to a) put down a few rolled layers of a high gloss/nonprimer white paint like the behr 1850 onto an opaque substrate like a piece of TWH??? b) put down many rolled or sprayed layer of a glossy white paint that has primer in it, like many spray can paints, until enough layers make the paint opaque to your projector image?? or c) apply many, many, many rolls or sprayed layers of a glossy/nonprimer white paint until it becomes opaque??? I know many people use mirrors for light fusion because the mirror has silver which is a reflective paint and that the mirror is opaque which gives a mirror is reflection quality but I'm not sure how that works when it comes to making a white gloss reflection substrate.: Whats the best way to get a high glossy white paint to send the most of the projector light back at you??? confused: