>>>> by hand as well, but it won`t look as professional simply because by hand you`ll never gonna be able to achieve the "mirror" finish as you would if you`d spin it with 3000 rpm.
The second option would be to get a good bench grinder, buffing wheels, different grades of polishing paste and you are on your way to make history.
The secret is to get a bench grinder that has a very high rpm. Also the diameter of the buffing wheels (get at least 2 wheels) is important but I think that they are not even made smaller than 5 or 6 inches - which is what you want. If the speed of the grinder is not high enough (at least 2000 rpm) you can try to make that up by getting a larger diameter buffing wheel.
Start by sanding the surface with high grade sanding paper (by hand). Depending on how deep the scraches are, start with a corse sand paper (grit 300 or 400) and gradualy work your way up - 600, 800, 1000. Once you get to 1000 you can use the bench grinder to finish up the surface to a mirror - literaly! You`ll notice that even with the 1000 grit sandpaper, the surface will be realy shiny but it will be full of little "hair" scraches.
The polishing compounds are different grades as well.... I suggest you do a research before you start, see whats avaiable.
So, there are 3 steps
1. sand by hand, don`t push hard. Gradualy use higher grade of sand paper
2. once you got to garde 800 or 1000, use the buffing wheel WITH polishing paste.
3. when satisfied with the results, use a CLEAN, DRY buffing wheel. You`ll be amazed how the surface will shine.
It is a lot a work, but the payoff is worth every minute of it !!!
Scoring disabled. You must be logged in to score posts.