The same lightweight joint compound you used on Day 2 will also work for your final coat on Day 3, but topping compound
The reclamation building at Brookhaven National Laboratory Upton, Long Island, N.Y., was completed in 1959 and featured a floor with a durable epoxy-base topping compound
that had higher physical properties and greater density than concrete.
He built a form and filled it with a special cement-based "topping compound
(plus lots of black colorant).
9 For smooth walls faster, finish with topping compound
, are "soupy" and contain less adhesive than all-purpose compounds.
* Topping Compound
. Designed to spread smoothly and sand easily, this stuff is meant for the last couple of coats.