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I had some drywall screen type sandpaper handy do I tried some 220 grit on a vintage Arkansas translucent that needed about an eighth of an inch removal to get flat . It worked really well. I used it with water, although not constantly running over it. Sofar for me , it seemed to cut faster grinding on its own slurry flOating inside the open squares. Maybe took five- ten minutes. YMMV. Worth a try. Lowe's Home Improvement
Thanks, I had forgotten that one! I had used it on the first mudstones that I bought way back when.
~Richard
That stuff cleans the heck out of porcelain too ! Old tub soap scum and stuff ,,, bye bye no scratches.
Argh! Like Geezer, I knew that but had forgotten. Sheesh, a couple of weeks ago I spent over an hour taking a couple of mm off a very hard jnat. Thanks for reminding me.
I guess it's true about the two things that happen as you get older, the memory starts to go and.. well, you know.
rs,
Tack
I've used 120 grit of sanding mesh like that for a long time. It works better than regular waterproof sanding paper and lasts longer. It does not stay flat though so afterwards you have to continue on sanding paper. I've tried a (worn) 40 grit sanding belt as suggested by others and that works even faster :)
And just to follow I just experimented with worn out 40 belt and added big pinch of sharp sand. It worked treat. Very fast. No need to get new belt and much smoother scratch pattern. Also feedback is audible. Once it changes the sound you just brush off the old powder and reload with new sand.
I am getting stones for xmas and will need to ensure they are flattened. What would be your best suggestion for doing this? I can't afford much either. Do flattening stones need flattening also? if so how do you really start?
____________________________Quote:
Originally Posted by Gonzo4str8rzrs
A Norton Flattening stone might need to be checked for flatness but diamond plates are supposed to be flat from the factory. Keep all your stones flat for best results. Good luck.......
Many guys use a DMT8C diamond plate for lapping their stones. I fall into that camp. They aren't terribly expensive and seem to work well.Quote:
Originally Posted by Gonzo4str8rzrs
Supposedly!Quote:
Originally Posted by mrsell63
I have had two that were about a mm out of flat when put on a machinists surface plate. They didn't answer my questions at DMT either. Just ignored me.
~Richard
I have used dmts and atomas. Since heavy lapping on hard stones like jnats kills these plates, I recently use wet/dry to do my heavy lapping and use the atomas to touchup. I use a granite lapping plate under the wet dry. Works fast and the wet dry I use up is much less expensive than a $100 plate. And you cant just use the atoma 400 as the surface is too rough. I also use the bbw the smooth the stones after 1200 grit. For synthetics, an atoma or dmt is great though. And the 1200 atoma for maintenance lapping works well.