Well finally I have started grinding again after what seems like an age but was actually just less than a month.precious wasted time though!So I have my grinding table set up in its new self contained room, which isn't a greenhouse and has a better roof strip light and the gf has agreed that I have sole access to the room so I an leave everything as is when I finish.
Gave the mirror and tile tool a good clean off after being packaged for the 250 mile relocation down south and then got stuck in with 30 minutes with the 400g.looking nice and shiny now.I need to get another magnifying glass as I've lost my old one but should be onto the 600 grit within an hour.I have some 600 alu oxide from eBay to start with and then some better spec stuff from John to finish it off.Won't be long before the bit I'm not looking forward too-pouring that pitch lap!!
wel I got all the way through 400g with no pits or scratches so I cleaned the tile tool off and got the 600 out that I had bought and tried a wet.Didnt go according to plan.The tool was just sticking against the mirror and was really hard to push across the surface.First thoughts were that I had used too much aluminium oxide so I washed the mirror and the tool off and tried again with less grit and a bit more water but the same result.I think the 600 I have may be much closer to 800 but also it crossed my mind that as my tool has ground down a lot that the channels may be too small so I cleaned those out but same result.I took the tool again and fully deepened the channels but I think the grit is wrong but I have some more 600 that John recommended that Damian has posted me (cheers again fella) so will try again .
The big downside was that from using the wrong??? grit there ended up being a fair few smll scratches near the edge of the mirror so have had to go back and do another 30 mins with the 400 and will probably do another 30 mins today on 400 just to make sure im back to prime condition before I move on to the 600.
better channels on the tool
trusty old diamond cutting disc
Another update soon hopefully.
Clear skies Rich