Otherwise, the coating is subject to bughole
-induced outgassing, a phenomenon occurring when applying protective coatings to concrete (predominately vertically cast-in-place) where air becomes entrapped within bughole
cavities and releases into or through the protective coating, thereby causing pinholes and holidays in the coating film.
Once you've seen the high level of fit and finish, and fired a few bughole
The foam fills all the voids, eroded areas, bugholes
, and missing mortar joints, and restores the surface to its original emplacement.
These are straight from the book, which doesn't actually have platoons going head-to-head with massive bugs, but has one or two trained Troopers in power suits chucking nuclear missiles down bugholes