Originally Posted by MT4Runner
$100 is CHEAP!!
What did you pay for the fittings?
Cast grade aluminum isn't supposed to be as easy or consistent to anodize.
Yes and no.
The seal on clear anodizing is really no seal at all. It is the anodizing itself. It is Aluminum oxide and is harder than just about anything but diamonds.
You are correct that a caustic bath will remove it, but I wouldn't want to substitute a permanent finish like anodizing in favor of paint!
You are incorrect on the seal. The hot water ni-acetate is the method of closing the pores and it is a seal. The problem with powder coating is its a dirty finish thats hard to remove when modifications become necessary.....and white powdercoat is butt ugly. Weld atop it and you get carbon inclusions in the weld. However, I agree, you can get pc cheap on colors that are leftover from a prod run but you have to live with someone elses colors. However, you can get krylon clear from $3.50 WallMart. If you scratch it, add more. If you want to remove it, use a wipe with MEK.
I do agree with you on the anodizing...garbage.. and it scratches easily; wont accept a covering coating without removal. It's also a semi conductor so you cannot weld it without removal.
Another note: Most alum castings and 4000 series rod contain silica for flowability. The silica becomes a dark gray precipitate when electroplating referred to as smut. The finishability is a tradeoff for strength. The strength of these cast alloys far exceed that of their anodizable counterparts...usually a factor of two....sometimes three.