I highly recommend finding someone else to do your install and service. It clearly sounds like they are a Fish tank company, not reef aquarists. And stuck about 25 years behind where the hobby is. Unfortunately most install/service companies do not have the experience or knowledge to do reef tanks like you are looking for.
And oh yeah, there are only two kinds of acrylic tanks. Ones with scratches and ones that don't have scratches yet.
We will only do acrylic when the application 100% calls for it. And NEVER in a reef.

I never understand how companies that have no clue get SO much business.