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| OK here we go. I'm gonna try and make this as short as possible but,
I'm tryin' to do a synopsis of 27 years operating as a 'slow learner'!
And I'm not saying that this is the only way to approach the subject of
polishing/grinding for plating or bare alum. I recommend that you have a plater dechrome or strip anything previously plated. It's easy to rebuff if you have a few of the correct things to work with. The front axle & springs were stripped of all chrome & nickel. Looks like an impossible task to make it shine but, it's not real bad. |
| I found the next 3 pics of the above after replate-the car is a little dirty but, you can see that it's worth the effort |
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This one is a bit blurred, sorry about that.
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| Here's some of what I've learned w/pics to help explain. I laid some of the tools/supplies that are needed. But, the individusl job will dictate what to use once you get started. Example, some things may not require the use of die grinders or flap wheels etc. This pic shows two air die grinders, one long & one med. There are some that are more short. There's a couple of sanding cartridges which screw on to 1/4" drive mandrels for the die grinders, some flap wheels (made of sandpaper pieces of a certain grit)and cotton buffs which can be sewn at different stitch spacing or loose. There are also sisal buffs which are made of hemp but, I never try to smoke them. They are really great for aggressive cutting on steel and stainless in combination w/various rouges. |
| This is a small alum. roasting pan a lot of small cotton buffs & flap wheels, most of which have a 1/4" mandrel made into them, you use them with the die grinders. |
| These are some of the more large mandrels, all 1/4" drive for use w/the die grinders. You can also see one that I made out of a long 1/4 x 20 bolt. I sawed a slit down the middle so I could tear pieces of sandpaper to slip into the slit, it acts like a flap wheel & works real well down in tight places. I try to save all the old belts from my belt sander for this cause they have a durable backing. |
| You can use 7" & 9" grinders but, they get up to 5,000 to 7,000 RPM's and the larger flap wheels are not supposed to be run over about 4,500 RPM's. Cotton buffs are ok at the high rates of speed. The two machines you see are actually polishers, both Black & Decker. One is a 2800 RPM, the other is variable from 1,500-3,000 w/variable speed trigger. They both have extensions that come in handy. You don't necessarily have to have them, but, if I'm doin' a deep dish wheel, they have to be on the polisher. They have 5/8" coarse NC thread at the end. The flap wheels are 8" in diameter, I think. Flap wheels come in grits from 80 gr. to 320 gr. |
| Here's some of the basic things you need. On the L. there are 6", 8" & 10" sewn cotton buffs w/1/2" center holes for mounting. I thind they are sewn at 1/8" spacing which produces a real firm buff. Close to them are some smaller cotton buffs of 2" & 4". Up front are a few of the rouges that are used mostly w/cotton buffs although, somethimes I coat the flap wheels with different rouges as I go along. From L. to R. 1. White-for polishing chrome are alum. 2. Black w/SS base, very good for using on steel & stainless w/the sisal (rope) buff as mentioned above. At closer look, this looks like it is green which would be for SS. The Black SS is very important to mention 3. Black Magic (sold by Sandpaper of Texas), for finish polish on alum. Can be used on just about any metal except brass. 4. Pink or Red is for brass & gold. Standing on the R. is a 10" cotton bias (some call them airway) buff. These come in 4" up to 18" or better. The centers are removable w/different diameters for your particular need. The bias are supposed to be used for the final polish but, I don't always do that. |
| This is the buffing lathe I welded up back in 1978 & I've done a lot, if not most of my work on it. It's made with 5/8" shafting that you can get at metal companies. It's supported w/3 5/8" pillow blocks with 1/2" slip over threaded ends for holding the buffs. On the left side is 3 to 4 10" close (1/8") sewn buffs for a final polish wheel. I like it best most of the time. On the R. is a 10" airway for final polish also, depending on what you want for the final finish. I went to American Iron/Steel in Dallas and got scrap pipe. This was my first welding project after taking my welding class. It's powered by a 1 1/2 HP Dayton elect. motor, belt driven w/step pulleys. I have it set at 1,900 RPM's which is a popular speed w/a lot of the guys I've talked to in the past. |
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I had to scan these last 2 pics together, I hope they come out clear
enough to see what's happenin'. This is one of the Jag lower control
arms. The top, of course, is where I started. This was just short of
tacklin' an engine block. I had to use the angle grinders/polishers
w/flap wheels to start with cause I couldn't get up to the lathe with
many of the surfaces, not to mention that each arm is pretty heavy. I haven't cover very much here, just scratched the surface but, if
I can do it so can you. The best way to learn is to get out there and
get your hands dirty. You should use a mask and eye protection. And
if your using a die grinder a lot, you'll have to wear leather gloves
because of the cold temp. I almost froze my hands this morning while
die grinding the finishing reliefs on my 383 block. John "T-Pilot w/Pups" Eplen
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