I am polishing a stainless steel exhaust header, and I am going to follow the grit sequence 220, 320, 400, 600, 800, 1000, 1500 and then polishI went to city mill and they only have up to 600 gritalso i've heard that the silicon carbide (?) paper is better for metal than the aluminum oxide paper they had at city millwhere should i go to buy my sandpaper?Finally, I noticed sandpaper has gotten pretty expensivelow grit paper was about $1 per sheet at city mill and the high grit stuff was closer to $2 a sheetis this a fair price for sandpaper?
bondo repair dents aluminum siding painting
Hello, Fillers do not work well on aluminumThe simple reason is that aluminum expands and contracts wildly and it works and twists once placed in the waterThe best bet is either to knock out the dents or if they are sever and risk breaking through or cracking then they must be filled by weldingA word of caution, heating aluminum while using a weld process to fill the holes or dents can make the area more brittle causing problems down the road due to the twisting and flexing that I mentionedThis is one of those times when it may be better to do nothing unless you just can stand looking at the dents any moreGood luck and happy boating.
Repairing Aluminum Siding
Sure bondo will work for a whileThe problem with aluminum is getting it to stick over timeHow deep are the dents? if they are 1/2 or less, then an elastomeric patch that comes in a caulking tube might work betterBondo isn't flexible and will pop off if the siding gets flexedlike hit again or even a strong wind.unless you sand and prime and allIf that's your plan, Seal Krete, sold in the driveway section of your paint dept is an excellent aluminum primerIn Home Depot the elastomeric patch is sold in the building materials section, not paintSeriously, the prep is ALWAYS the harder part of a PROPER paint jobIf you are willing to do it, why not the whole thing?
an auto-body supply store or n a p a has auto-body papers.
