Eraser is a panel prep spray. Can it be used as a detail spray also?
No, a panel prep is no way shape or form a detail spray. It’s meant to remove oils, waxes, sealants, compound etc.
Personally I use ONR diluted as a detail spray for any ceramic coating I’m maintaining, I don’t like to combine detail sprays and strong protection, I only want it to help as lubrication for drying or quick touch up from bird crap. Just a personal preference.
For a topper I’ll use Xtreme Solutions Topper every month or two. When in doubt for which topper, stay in the brand family and use whatever topper/boost they recommend. You’ll know the products will have synergy.