so on a whim tonight i decided to take my 5lb aluminum bottle. sand it and polish it
pretty much happened because my tank ran out early. either i injected 5 lbs worth in my 29 gallon over three weeks or i have a leak. i did check for leaks and found none.. this is the second time this has happened. neither time have i found a leak. same setup has gone 3 months before plenty of times.. ehh oh well
Three weeks ago I knew nothing about Co2 and it's importance in photosynthesis. Now I could write a book on the stuff esp. when it gets to diffusers vs. reactors. That tank deserves every bit of that attention but the stuff inside is the magic.
Dogfish, it is a side job so it does help that i have all the tools available to me
start with 180 grit move up to 320 grit move up to 500 grit.. any sander is preffered over hand. if u have to do it by hand. do it with wet sand paper and use a spray bottle to keep the medium wet. reduces a lot of fatigue..
with any kind of rotary or jig sander electric or air on a round surface its best to go back and forth perpendicular to the curve, in this instance its lengthwise of the bottle. this way you can keep the radian of the bottle without having distortions.
after 500 grit u need a 2-3 stitch or 3 ply buffing wheel. 6 inches or more is preffered. width is irrellevant until you talk heat. brown rouge followed by white rouge. then super white on a 1 stitch buffing wheel.
3,000 rpms is an excellent beginner speed and decent pressure is needed as well.