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Painting Equipment

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Walt

09-11-2004 14:03:18

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How much preparation is required to paint equipment? My goal is protection,as well as making it look better, not new. For example, I have pressure washed a bush hog, top and bottom, and have ordered a sandblaster. Do I really have to sandblast? Is light sandblasting to remove loose rust and paint enough? I have used "rust converters" and they don't seem to work for me. I plan to use coal slag (black diamond) as a blasting media if I sandblast. Any helpful input appreciated.
Walt Baker

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CPeter

09-14-2004 17:57:31

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Black Beauty in reply to Walt, 09-11-2004 14:03:18

Black Beauty is ground up slag from coal fired power plants. It comes in several grits from a talcum powder extra fine to gravel coarse. I like the fine stuff myself as it is easier on the parts and doesn't rough it up as much as the medium. It is
better to disassemble, if possible. It gets into everything and is quite abrasive. Also, be sure to wash it down after as the particles will stick in the metal pores. It is safer than silica sand. I buy it at the source in 3,000# pallet loads for almost nothing. It is about the dirtiest stuff on earth. Be sure to use a good dust filter and hood. I use the Tyvec jump suits that go from head to toe and a premium hood and filter.

CPeter

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Walt

09-15-2004 17:22:32

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Re: Black Beauty in reply to CPeter, 09-14-2004 17:57:31

Thanks. I knew it had to be vacuumed to washed, but I didn't know it was because the dust stuck in the metal pores. That's fine.
Walt

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Walt

09-13-2004 16:58:28

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Re: Painting Equipment in reply to Walt, 09-11-2004 14:03:18

Hey Guys,
Thanks for all the good comments. My sandblaster hasn't arrived yet, but I picked up some coal slag today--this brand is called "Black Ligthing." Has anyone had good, long-term success with rust converters, or a primer with a rust converter, such as Jasco's Prep and Prime? I am being told not to give up on such rust converters.
Walt

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andy b.

09-11-2004 21:09:22

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Re: Painting Equipment in reply to Walt, 09-11-2004 14:03:18

Walt,

is coal slag a recommended blasting media? i would think the respitory dangers would be worse than for silica sand. if in fact it IS a good blasting media, i may pick some up next time i'm at my parents (they live in PA coal-mining country).

a couple of painting notes. if you are going to sandblast, make sure the gear box is removed and any bearings as well. blasting media will get EVERYWHERE and you will be replacing seals at minimum on the bush hog gear box if you blast it. i found the ultimate tool for removing rust (other than FIT's reverse electrolysis setup) is a needle scaler. i bought mine on sale at Harbor Freight for $65 or so. is needs a decent air compressor (several CFM at 90 psi) but it knocks off rusty scale and dried grease and dirt like no tomorrow. i use it on all my projects and it is way better than sandblasting to remove the heavy stuff.

andy b.

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Walt

09-12-2004 04:22:12

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Re: Painting Equipment in reply to andy b., 09-11-2004 21:09:22

Andy,
Coal slag is cleaned and processed, sold as Black Diamond, Black Beauty, and Black Blast. It is supposed to be the safest sandblasting media. This I have read; no personal experance yet. Thanks for the tip about removing the gearbox. Walt

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Dale(MO)

09-11-2004 17:14:35

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Re: Painting Equipment in reply to Walt, 09-11-2004 14:03:18

Walt, I am by no means a painter, but I have found that if you are going to just preserve a piece of equipment, a steam cleaner is about as quick and easy as it gets - especially if it a simple piece, such as your brush hog. If you wanted to really get fancy, you could use a wire wheel on a side-wheel grinder and take it to bare metal. Of course, then you really should prime it first. That is how I have done my HD3 Allis Chalmers high lift, and it looks really good (to me, anyway). If I had it to do over again, I think I would rent a steam cleaner and then paint over what was left. But as I said, I am NOT a painter by any stretch of the imagination. Just my $.02. Good luck!

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jrb

09-13-2004 10:54:17

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Re: Painting Equipment in reply to Dale(MO), 09-11-2004 17:14:35

black diamond media works great, white sand from your local hardware store does the job to. another way is to purchase a 8 to 10 inch course sanding wheel . prepare your equipment by washing or steam cleaning first, next wipe it down with paint thinner or equilevent. two coats of primer next 2 coats of the paint of your choice. sand between each coat as needed. you must seal or remove all bearings if sandblasting.

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Walt

09-12-2004 04:37:17

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Re: Painting Equipment in reply to Dale(MO), 09-11-2004 17:14:35

Dale,
Thanks for the input. From your and other comments, sandblasting may not be the best answer.
Walt

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Frank W. Fox

09-11-2004 21:00:22

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Re: Painting Equipment in reply to Dale(MO), 09-11-2004 17:14:35

Be carefull if you sandblast, it can/will drive sand in past the seals to the bearings. Steam/pressure will do the same thing if you get to agressive aroung shaft"s and wheel bearings. I like sand blasting, but normaly dissambel the equipment first. You can sandblast as long as you point it away from gearboxes and bearing"s on shaft"s and wheel bearings. If you steam clean you can make sure most of the loose stuff is off if you go over it with a hand held wire brush and a scrapper. I spend too much time, trying to make it look new.
My 2cent"s worth

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Walt

09-12-2004 04:32:52

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Re: Painting Equipment in reply to Frank W. Fox, 09-11-2004 21:00:22

Frank, thanks for the tips. I had no idea one had to be so careful. I hope the pressure wash didn't do any damage. My washer is medium to low pressure, about 1300 lbs psi.
Walt

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Raymond Bagwell

09-12-2004 10:58:59

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Re: Painting Equipment in reply to Walt, 09-12-2004 04:32:52

Try this around seals and shafts. Use masking or duct tape and tape the arear aroune the seal. Take some of the foam in a can you can purchase at your local hardware store and foam over the tape. The foarm will seal to the adjoining metal and will not allow the blasting media to get to the seal. When sandblasting coal slag is the only way to go. IMO. The finer the better.

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Zane(WA)

09-12-2004 17:52:32

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Re: Painting Equipment in reply to Raymond Bagwell, 09-12-2004 10:58:59

The expansive foam seals and adheres pretty good. Kind of a pain to get it all removed prior to painting (sticks a little too well sometimes). I've filled some gaps between the seals/bearing with different sized backer-rod then foamed over and taped. I haven't noticed any problem with seals or bearings/bushings giving up the ghost when using it this way. I wonder how well expansion foam will work on a warped oil pan or in place or a gasket ?

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Dozerboss

09-12-2004 21:49:57

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Re: Painting Equipment in reply to Zane(WA), 09-12-2004 17:52:32

Depends on the foams resistance to oil. When i think of foam, its a porous material, yet it will work as a cooler and hold water for a time. I think it would be like many plastics, some melt. We tried chemical rust remover in wall paper trays. They were long, shallow and the right shape to use as a mini dip tank. They melted down in less than an hour, yet the remover is sold in a plastic jug. Obviously a differant type of plastic. You guys who have used black beauty--how does it cut? I was surprized to hear a coal product was the current choice media too. Hopefully 20 years down the road there won't begin to show illnesses from it like sand.

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Ol Chief

09-13-2004 17:26:37

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Re: Painting Equipment in reply to Dozerboss, 09-12-2004 21:49:57

In the deep sea marine trade black beauty is the material of choice for blasting ship bottoms and almost all exterior hull and super structure areas made of steel.All glass is covered with a fairly live neoprene or rubber sheet gasket type material.(Usually cost is no object and the material can be used many times over). All soft metal such as bronze or copper used on port hole or window frames is cleaned with Fine white sand which is referred to as sugar blast.I recommend you NOT use black beauty on your sheet metal as it is very agressive and will verrry rapidly thin the metal as well as make it rough.Also cover name plates and tender areas with rubber.

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Dozerboss

09-14-2004 16:15:16

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Re: Painting Equipment in reply to Ol Chief, 09-13-2004 17:26:37

Thanks Chief.

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