That's a great looking tank. Especially like the stand. Gonna be alot of fun. I've never seen a pump like that before, I researched it on their site, it seems to be some sort of hospital grade pump. Here's a clip from the site.
Do you require compact, quiet, highly efficient pumps for your Laser, Chiller or Blood Analyzer Applications? Iwaki America pumps are compact, offer higher pressure, AND last longer than any traditional offerings.
Do you see any rust on it? If you're concerned about it, check out the mag pumps. You'll need something like a Mag 9 or maybe slightly bigger. It's always better to get a bigger pump, and you can turn the volume down, rather than have a pump that's too small.
As far as cleaning the tank for scratches...I've heard that it's possible to remove scratches but have never tried it myself, I think it's a good rule of thumb to consider ANYTHING that you use to clean your tank toxic or harmful to your fish. IMO saltwater fish are easy to take care of, I think most of the time when people have bad things happen it's because they're not paying attention or do something they shouldn't have. Keeping that in mind, while easy to care for, if you do something dumb or careless, these fish are very intolerant. The key to happy saltwater fish is STABILITY...
When you clean the tank use white vinegar, it works well..Don't use any cleaning products. Make sure you rinse very well.
Find the side with the most scratches and put it in the back...look closely, sometimes the most annoying ones are hard to see.