I brought a Dovo razor (new) a while ago and still haven't been able to hone it. I thought I'd got there today, but when I tried shaving it was very blunt.

Initially I ordered a hone from Amazon that was 1500/4000 and used it but then I found out online that 4000 grit isn't enough. So, I brought a 12k stone from eBay. I have spent over an hour this last few days honing the blade with this stone just as the various videos on eBay demonstrate - bit of tape, holding it flat, pushing in the direction of the blade, rather than away from, not too much pressure etc etc.

But it just isn't working.

Could it be that my early attempts at honing (when I didn't know what angle to use) messed up the blade?

Or could it be that my hone is actually not 12k?

Or does it just take a really long time?

All advice and thoughts welcome. Thanks in advance