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Best way to prep a tractor for paint W/O sandblasting
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BobinIL
Posted 4/11/2011 12:43 (#1719289)
Subject: Best way to prep a tractor for paint W/O sandblasting



Danville, Illinois
I want to repaint my 4020 but I do not want to sandblast it. It has had at least one really half a$$ attempt at a repaint job in the past. Lots of paint over older chipped paint and dried grease painted over. I want to strip it down as good as possible without sandblasting. I have a 2600 PSI pressure washer that only used cold water. Should I get some good degreaser and some sort of paint stripper to use on it? Wire wheels for my mini grinder? What works best?

Edited by BobinIL 4/11/2011 12:43
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detroitdiesel
Posted 4/11/2011 14:15 (#1719406 - in reply to #1719289)
Subject: Re: Best way to prep a tractor for paint W/O sandblasting


Chillicothe, Missouri
I would have to tell say that depends on what all services you are wishing to paint, But I will do my best to address all the different aspects that I can.
Iwould first strip down/off all the sheet metal, leaving the cast iron to be painted on the tractor. Clean the tractor Extremely well with the pressure washer, then get a gallon of laquer thinner and spray on a wet coat of laquer to remove the petrolium products from the surface. Wipe any areas that were greasy with a rag that had been soaked with laquer or Dupont 3812 a grease and wax remover. then the cast shoud be ready for paint, I would also sand and flat surfaces with a dual action sander 80 grit paper then 180 grit following

for the sheet metal, I would first clean with 3812, then sand with Dual action sander make sure to "feather edge" any older paint still on the surface, this will prevent edges from the old paint being seen under the new surface. I would recomend a final grit of 180 this should be fine enough to prevent sand scratch swelling. Then after finished sanding clean with Dupont 3901 a final grease and wax remover.

I would give you info on how to spray for the painting, but I do not know what kind/style of spray equipment you are going to be using.
Hope this helps! I have a Associates degree in auto collision and refinishing.
Diesel
I will try to post a couple pictures of tractors we have restored.
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detroitdiesel
Posted 4/11/2011 14:21 (#1719412 - in reply to #1719406)
Subject: painted tractor pictures


Chillicothe, Missouri

here are a few pics of the tractors we have done on the farm.
The industrial oliver was fratured in Heritage Iron Magizine
Diesel

if I can work the computer....
first was a '63 MF 35 Diesel Delux
second was a 1950 Oliver 1950
the third was a 4-115 Mighty Tow (Industrial)



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twraska
Posted 4/11/2011 14:30 (#1719424 - in reply to #1719289)
Subject: RE: Best way to prep a tractor for paint W/O sandblasting


Wallis, TX
We use Purple Power straight, spray it good, let it soak and pressure wash off, do this at least twice to get all the grease and oil off. A lot of the loose paint will come off. The rest loose flaking paint on cast can be removed with an air needle scaler, like what welders use to chip a weld. Do not use the needle scaler on sheet metal or anything smooth, it will ding it up and look rough. It is a real pain to go behind a bad job and get good results. It can be done but you have to get below what they screwed up or you will just have another bad job. We then use epoxy primer and top coat with 2k urethane from DuPont or if you want you can go over the epoxy with enamel. I would NOT use cheap lacquer primer, it chips too easy.
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wishbone7803
Posted 4/11/2011 16:49 (#1719539 - in reply to #1719289)
Subject: Re: Best way to prep a tractor for paint W/O sandblasting


Almond Wisconsin
I agree with twraska. If you have a good comressor a air needle scaler does alot. Good primer and hardener additive are helpful.
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Cotton Picker
Posted 4/11/2011 18:08 (#1719607 - in reply to #1719289)
Subject: Here's one I did..



Holly Island, AR
Here's a before and after pic of a Super MTA I did last month. I didn't sandblast, I used some course sandpaper on the frame and cast, used some 80 on those rusty wheel wieghts, went finer on the frame. I used a combo of DNW engine cleaner and some stuff call "New Start" I bought of a snake oil salesman, except that is really good stuff. I did have a steam cleaner that helped. After I cleaned it up, that's when I did the sanding. I funished with some 600 grit on the sheetmetal, took it down to the bare steel, this tractor had 3 different coats of paint over the years. I used the Omni 190 "i think it was" Opoxy primer". and finished the red with some 2k single stage urethane. Put on about 5 coats. Hope this helps, good luck Bret.



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redgreenandrust
Posted 4/11/2011 20:12 (#1719753 - in reply to #1719607)
Subject: Re: Best way to prep a tractor for paint W/O sandblasting


thumb of michigan
Any of the sheet metal that you sand make sure it is done to a final grit of 400 at least. 180 will show through and sand scratches will make it look terrible. Super Clean works real well but beware that it will turn JD green to a pale yellow most times. No problem if you are painting over it, but beware that the contrast between yellow and green might show through if you don't cover it up with a primer/sealer. If the sheet metal has a lot of old paint on it I would get as much off as I could because the old paint might craze or lift with the application of new paint, also it can cause gloss die back if not sealed well.
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acfarmer
Posted 4/11/2011 23:12 (#1720327 - in reply to #1719607)
Subject: RE: Here's one I did..


Revere Missouri very northeast corner.

Your MTA turned out real nice.

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redgreenandrust
Posted 4/11/2011 20:15 (#1719761 - in reply to #1719289)
Subject: Re: Best way to prep a tractor for paint W/O sandblasting


thumb of michigan
If you don't have a very good D/A sander I would suggest going out and getting one. Your air compressor and hands and ears for that matter will thank you. National Detroit makes a great one. Not cheap but they run smooth and quiet and strong. Totally rebuildable too. Only had to do one in 20 years and that was just a seized bearing.
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redgreenandrust
Posted 4/11/2011 20:23 (#1719777 - in reply to #1719761)
Subject: Re: Best way to prep a tractor for paint W/O sandblasting


thumb of michigan
Website is kind of interesting and they are made in the USA. I have no affiliation with them other than being a very satisfied customer. If anyone who does body work wants to give themselves a treat I suggest putting them in your tool box.

http://www.nationaldetroit.com/global/
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msb
Posted 4/11/2011 21:48 (#1720028 - in reply to #1719289)
Subject: RE: Best way to prep a tractor for paint W/O sandblasting


Lapel, In
Use MEK (With gloved hands) or other product like lacquer thinner to remove any caked on grease after power washing and scraping the areas. I prefer to use paint stripper for the old paint on the sheet metal. I think it is the quickest way to prep metal.Take it clear down to the bare metal Sand the rust spots with a fine grade paper( I use 120),until smooth to touch. Wipe down with thinner.Then prime with epoxy primer.Sand that lightly,wipe down with thinner and shoot it right away. I like to warm the paint by setting it in some warm water for a while if the shop is a little cool. Double filter all paint to remove any unmixed or undesolved pigment. DO NOT sand blast sheet metal. If you don't know what you are doing you can warp the metal.
A steady hand with a thinner soaked rag can save a lot of masking on a tractor,especially the rims and hard to mask areas.
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farmechspector
Posted 4/11/2011 22:24 (#1720194 - in reply to #1719289)
Subject: Re: Best way to prep a tractor for paint W/O sandblasting


ECMN
Another trick someone posted on here a while back was to use aluminum foil for masking odd shaped parts like the steering wheel and such. Thinking back on some things I have painted, knowing that would have been helpful. Make sure you share some photos of the excellent job your going to do!!
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