Scratchs in Acrylic

[Zerandise]

Anyone know how to remove DEEP scratchs in acrylic?

I am workin on a rather scrated up 140g tank. after MMANY hour i have gotten most of the smaller scratches out of about 1/4 of it. however it has some prety nasty ones still. Novus #3 has taken the edges off them but doesnt seem to be able to eat them all the way.

Any ideas? As well can you use a low power buffer on acrylic for scratch removal? It would really speed things up. removing all the scratchs in a 1x2 section inside and out has taken up a couple hours. to do the full tank will take a few days lo.

Thanks for any help.