Flemish to English Tech/Engineering Chemistry; Chem Sci/Eng

Voorbereiding:

Oppervlak grondig ontroesten en ontvetten, algemeen nazicht van werkhuisprimers.

This is a tender document for having a large commercial building repainted. The specific area that applies here is a bare metal ceiling (i.e. has never been painted before).

Google comes up empty, so I'm not exactly sure what type of a primer they are talking about here. It may be worth mentioning that I have come accross a few dodgy terms/sentences in the source text so far.

TIA