pucho812

removing deep and light sctraches out of aluminum(how do I)
« on: January 05, 2012, 12:39:13 PM »
wondering what is the best way to go about this. The piece in question is a top cover of a rack unit that was not even clear coated.  The cover has some light scratches but also has a deep scratch where some knuckle head carved the letter A. Obviously it's ugly and I would like to remove the scratches. However I may like to keep unpainted bare aluminum, I am still debating on that. Main thing is the scratch removal. Now am I correct to think that my approach will be different if I paint it in the end vs not painting it?

Should I just use an orbital sander with good enough grit and sand it down like one would do for wood then paint it?

You tell me whar a man gits his corn pone, en I'll tell you what his 'pinions is.


Ptownkid

Re: removing deep and light sctraches out of aluminum(how do I)
« Reply #1 on: January 05, 2012, 09:45:28 PM »
If you are going to paint it, then you can simply fill the deep scratch. Yes, you can use and orbital sander and sand it just like wood. Keep working your way through to finer grit until you get the finish you want if you choose not to paint.

peterc

Re: removing deep and light sctraches out of aluminum(how do I)
« Reply #2 on: January 06, 2012, 02:24:27 AM »
What is the other side like? Can you flip it over if it will fit?
If opportunity doesn't knock, build a door.

gyraf

Re: removing deep and light sctraches out of aluminum(how do I)
« Reply #3 on: January 06, 2012, 04:51:57 AM »
Wouldn't cutting a new top cover be quicker and easier?
..note to self: don't let Harman run your company..

pucho812

Re: removing deep and light sctraches out of aluminum(how do I)
« Reply #4 on: January 07, 2012, 08:33:05 PM »
What is the other side like? Can you flip it over if it will fit?

no. it has a top and sides and is one whole piece.


Wouldn't cutting a new top cover be quicker and easier?


Maybe.


If you are going to paint it, then you can simply fill the deep scratch. Yes, you can use and orbital sander and sand it just like wood. Keep working your way through to finer grit until you get the finish you want if you choose not to paint.

thanks for that. I sanded it down till the scratches were removed. then I used rubbing compound  like for a car and polished it up nicely. Not perfect but better then having to paint it. looks nice now as before looked horrible.


thanks for the responses gentlemen

You tell me whar a man gits his corn pone, en I'll tell you what his 'pinions is.

Jean Clochet

    Currently taking a break to smell roses and the coffee
  • Posts: 387
Re: removing deep and light sctraches out of aluminum(how do I)
« Reply #5 on: January 29, 2012, 05:38:14 AM »
Keep working your way through to finer grit until you get the finish you want if you choose not to paint.

Yep. 
Also, once you've worked your way down to finer grits, you can then switch to one of those abrasive cleaning pads (Scotch Brite) if you want a nice fine grain on the piece at the end.  Just pull or push it along the length of the aluminium in straight lines, working your way across the width with each pass.  I've refinished a few old Zeiss camera lens housings with those pads after taking care of the bigger scratches with a bit of emery.  The lenses came out looking better than they were when new in 1945.

John Roberts:  I am generally not enthusiastic about the project with or without trimpots...


 

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