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[TowerTalk] Aluminum scoring

To: towertalk@contesting.com
Subject: [TowerTalk] Aluminum scoring
From: "k3hx@juno.com" <k3hx@juno.com>
Date: Sun, 30 May 2010 22:23:48 GMT
List-post: <towertalk@contesting.com">mailto:towertalk@contesting.com>
OM,

I use abrasive sponges from Harbor Freight. Use them dry as the adhesive used 
to hold the grits onto the sponge is pretty weak.

While you are wandering around the Harbor Freight store or going through their 
catalog you may note a 1/2" wide belt sander.  Thing is a piece of junk.

Also, I've used "Scotchbrite" abrasive discs such as you might find at an auto 
supply store that caters to body shops.  Tell the counter person what you want 
to do and they can recommend the proper grade of abrasive disc.  

As for the inside of the joining tube, I have used a sandpaper "flap wheel" on 
a long extention.  Or, you could ask the folks at the auto store for a cylinder 
hone.  The catch is that the cylinder hone will be pretty expensive.  Many auto 
parts stores have a machine shop attendant to them, perhaps they have a used 
cylinder hone they can let go for cheap.

I'm not a fan of using steel wool as the little threads can become embedded in 
the aluminum.

To prevent future trouble getting things apart, I clean the smooth surface with 
91% isopropyl alcohol and then apply a coat of ordinary automotive polish and 
then some anti-seize.

72,

Tim

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