hey bud I just finished sanding my 300 gallon tank. It is 30 wide 24 tall and 8ft wide. I used the blue kit with the small 2x3 block made by pentair i think??? I did it all by hand with about 40 hours total work i think.
I went to our local acrylic manufacturer, they fix their acrylic with a drill with a buffing wheel and jewlers rouge... They refused my project cause they said it would over heat the acrylic and discolor/warp it. They make a living at it so I believed them.
I think if you want quality results get the kit I got but I have some time saving tips I learned the hard way:
-fill the tank with water put the lights you are gonna use on it,
use a grease pencil to mark the visible scratches only (i did ALL the scratches on the side panels, after it was filled i couldnt tell a diffrence from the front panel where I only did the visible scratches)
-start with only the grit you need to take out the particular scratch (some scratches I only needed to start on the 4000 grit to take it out)
-Do the work in a dim work area and get a flashlight (i prefered an LED flashlight cause it was long lasting, bright, and slightly blue which helped in seeing the scrathes.
-hold the light on the outside, look from inside, hold the flashlight at diffrent angles to light up the scratches, hold the light about 4 inches away from the front
-if you are careful you CAN use your fingers behind the paper
-after you do a certain grit go back over lightly to knock the top off the new grooves you made (you are making mini mountains horizontally and vertically as you go)
-wet sand with a bowl of water and rinse the sand paper often, also use a small rag to flush/wash the area so you can see your progress.
-pad your body with towels to ease the bruising
- READ THE INSTRUCTIONS
-buy "Advil", you are gonna need it.
Good luck
