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Acid, Sanding or Sand Blast ?

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Brian

10-04-2001 18:38:03




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I am working away at my super A. I was wondering if anyone had any thoughts on the best way to get the parts ready for painting. I've often heard about dipping parts in an acid, and recently I notices a gallon of liquid acid at the parts store. Assuming this is the right product to use, can anyone offer some advice on if I can or cannot use a acid bath.
I have a 5 Hp compressor, but my sandblaster doesn't seem to do great job. (it's cheap)
And finally, there is good old sanding. I hate sanding especially when I could be using a tool that makes noise. However for somethings like the tank I'm wondering if it wouldn't be best.

Here's another question. The front grill and engine cover have some dents in them, some rather deep. Will I ever be able to bang them out or generally speaking is it always going to be there is some way ?

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Dave T

10-05-2001 08:04:17




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 Re: Acid, Sanding or Sand Blast ? in reply to Brian, 10-04-2001 18:38:03  
I have just a small 5 gallon or so sandblaster with a 5 hp compressor. I had a lot of grief with it until I replaced the nozzle tip with a 3/32 carbide and used 20/30 silica. My compressor keeps up very nicely now, but sandblasting is still a nasty job..



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jmyt_47

10-05-2001 07:38:16




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 Re: Acid, Sanding or Sand Blast ? in reply to Brian, 10-04-2001 18:38:03  
Sanblast...get all your big parts degreased and disassembled and rent a diesel powered compressor from your local equipment rental. That made short work of my 300...(I didn't do any of the sheetmetal though) I think I spent more time loading the sand into the tank than sandblasting.. Right now I wish I had a sandblasting cabinet and a larger compressor in my shop for all the little parts.



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Red Dave

10-05-2001 06:17:09




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 Re: Acid, Sanding or Sand Blast ? in reply to Brian, 10-04-2001 18:38:03  
I think sandblasting does the overall best job, but, if you aren't careful and do things right, it can also do a lot of harm too. I have used a 4" grinder with a wire brush on it with good results and an air powered needle scaling gun works good on heavily rusted cast pieces too. I don't have much luck with paint strippers or high pressure washers, but some people like them.
I have worked dents out of hoods & grills with a set of hammers & dollys. You can get a cheap set at Harbor Freight. It takes time and it's noisy, but it works. By the way, you will have to hit these old tractor parts a lot harder than you would the fender any modern automobile. The metal is a LOT thicker.

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ralph

10-05-2001 02:07:55




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 Re: Acid, Sanding or Sand Blast ? in reply to Brian, 10-04-2001 18:38:03  
Brian: Those dents would be no problem to an old auto body repairman. Years ago removing dents in metal was an art. Now they replace whole plastic body panels. So ask around for an older bodyman.. R.



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