How thick is the acrylic? Just curious because I used to hate acrylic due to having to drain and buff a 350 gallon reef just to get rid of a scratch is a serious pain in the butt.....HOWEVER, I have since grown to LOVE acrylic due to how easily i can take out scratches without draining the tank at all.....
Algae Free makes a scratch removal kit, EVERCLEAR , which is basically a type of rubber "sandpaper" that you attatch to either one of their magnets(rated to the thickness of the acrylic) or the appropriate sized Magnavore. Basically, you start at 1500 grit and work your way down (step by step) to 6000. This is for DEEP scratches on the inside of the aquarium, and I usually take about 1/2 hour per sq.ft. on these areas.... However, on light scratch areas , it usually covers 2-3 sq.ft. per 1/2 hour. The best part is you can do 1/2-1 full hour a day, and(depending on the size) have it done in a fairly short time (while getting a little arm workout!) and not have to rush around while you have an empty tank needing buffing and its inhabitants in a holding area(my customers love this)
There is also a hand kit for the exterior, which is basically the same thing, except the pads are made with the rubber material on both sides, whereas the magnet kit has the rubber on one side and the other being more cottony so that you can affix it to the magnet. The exterior kit also comes with a little stopwatch, wax pencil(for marking heavy scratches),a chart to corallate to the marks you made with the wax pencil, and a cotton polishing/finishing pad.
Sorry , not trying to sell a product, but this changed my outlook on Acrylic aquariums forever. Anyways, you can order all of this either at your LRFS(Local Respectable Fish Store) or at algaefree.com