acrylic buff

I just moved my old 100 gallon acrylic tank to my new place to do some heavy cleaning and polishing. Tank hasn’t held water in well over a year. But I noticed some stress cracking in the lower left hand corner. I cannot feel the crack on the outside of the tank, but can definitely feel it with...

Hey guys. I had posted about canister vs sump filtration for a 265 I was possibly going to buy and another amazing deal came on my plate to purchase a 375 acrylic tank for next to nothing... I mean seriously, I basically got this thing for free so I went ahead and locked it down sight unseen...

Can I use this stuff to buff out my tank or should I just get the Novus 123? Thanks in advance mfk bros