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Sandblasting

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David (Scotland

06-07-2002 10:26:34

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I need to get my tractor ready for paint and was thinking of sandblasting it. What views on this do you guys have? I'm not sure whether I should pay someone to do the whole job or buy a small sandblast pot and try to do it myself. I have access to a couple of compressors that could be manifolded together to increase the airflow, if one wasn't up to it. Has anyone any experience of these small systems? Do they work? Or does it really need a "road compressor" to get the pressure and flow rate high enough. Machine I'm considering has a recommended air delivery requirement of 10cfm @ 80 psi (can be up to 125psi) but I suspect they may be less that wholly honest about what is really needed. Is a higher pressure or flow needed to do the job. I'm just a bit sceptical about the effectiveness of "budget" equipment.

Also wondering about wet blasters? I know I'd get rust from the water and they aren't ideal in that sense but I do have a high pressure washer that would do the job and the sand attachment is cheap. How well do they work?

If you've done any of this yourself and regretted anything please let me know. I'd rather learn from somone elses mistake than my own.

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Pat

06-10-2002 09:35:48

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Re: Sandblasting in reply to David (Scotland), 06-07-2002 10:26:34

Sandblasting is the only way to go. It's quick & easy. Invest in a pressurized unit. You can buy them for about 300.00 to 400.00. With common sense damage is not a problem unless you hold your nozzle on the a delicate peice for a long time. I have been sandblasting for years and it works. Make sure and buy a good respirator or air hood.

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David

06-09-2002 04:20:52

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Re: Sandblasting in reply to David (Scotland), 06-07-2002 10:26:34

Thanks for the follow ups. I've spoken to a few people here in Scotland about dry sandblasting and they also share the view that it will be a slow, miserable and possibly damaging job to tractor and operator. I have some phosphoric acid (as milkstone remover for dairy farm) and I think I'll try the wire brush and some of that. Also have something called "Blue Steel Stabilising Solution" that seems to have an effect on the rust too. Seems to me you need really serious plant to do the job well with either wet or dry blasting and, with anything less, I'd be as well throwing sand at it with a shovel!

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Kevin Holmes

06-08-2002 18:46:32

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Re: Sandblasting in reply to David (Scotland), 06-07-2002 10:26:34

I hate to sound stupid, but what is 'Lye', and to what ratio do you mix it? Thanks.

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Dale E.

06-13-2002 17:00:40

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Re: Re: Sandblasting in reply to Kevin Holmes, 06-08-2002 18:46:32

Kevin, Lye is sodium hydroxide. Same thing that is in oven cleaner.HTH, Dale

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Dale E.

06-13-2002 16:57:57

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Re: Re: Sandblasting in reply to Kevin Holmes, 06-08-2002 18:46:32

Kevin, Lye is sodium hydroxide. Same thing that is in oven cleaner.HTH, Dale

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Kevin Holmes

06-13-2002 18:32:58

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Re: Re: Re: Sandblasting in reply to Dale E., 06-13-2002 16:57:57

Thanks, guys!

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Green_in_MI

06-08-2002 19:59:28

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Re: Re: Sandblasting in reply to Kevin Holmes, 06-08-2002 18:46:32

Lye is sodium hydroxide, a caustic substance generally used to clean drains. Its either a teaspoon or is a tablespoon per gallon water(I forget which) will create solution that will strip paint. I have used it effectively in a stripping tank where I used a battery charger for an electrolysis reaction. The instructions are explained by F. in Tallahasee on one of the other discussion forums as Jerry S mentions. I have not tried the lye and water mixture with corn starch yet, but I think that is next for me instead of the electrolysis.

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Duner Wi

06-07-2002 17:39:56

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Re: Sandblasting in reply to David (Scotland), 06-07-2002 10:26:34

Even with 2 compressors progress will be slow. I have a 70 cu. ft. Smith and I can move along. Is a miserable job and you will get sand in places where sand should not be. I would go with lye solution or paint remover and a pressure washer. Lots of pressure washing of the seams and cracks or it will come back to haunt you.I have not tried the lye solution but aI put paint remover on with a spray gun. Goes on fast and even. I sand blast rims and such that I have removed from tractor.

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Jerry S

06-07-2002 13:44:34

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Re: Sandblasting in reply to David (Scotland), 06-07-2002 10:26:34

David, I have heard many people say that sandblasting a tractor is really rough on bearings and it is really hard to keep the sand out of some critical areas. As an alternative to this, on the John Deere board, Frank in Tallahassee has came up with a good inexpensive homemade paint remover you make yourself with corn starch and lye. I tried it and it worked wonderfully. With the parts that were rusted, it won't remove rust but you can treat rust with either sandpaper or a phosphoric acid solution or a rust converter. You might give the lye gravy a try first and see. For a minimal investment, you haven't much to loose.

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John

06-12-2002 11:56:27

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Re: Re: Sandblasting in reply to Jerry S, 06-07-2002 13:44:34

I have restored several tractors over the years and would not recommend sandblasting near the engine or transmission, as sand goes everywhere when you are blasting. I would use paint strippers for the engine and transmission and remove any parts that need to be blasted.

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John

06-12-2002 11:52:59

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Re: Re: Sandblasting in reply to Jerry S, 06-07-2002 13:44:34

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