@evansd2 Tung Oil will be how I do it until I see something better.
- It does give me a nice darker tone than unfinished slate. It also is flat black and not shiny or oily.
- It took days to fully cure and it seemed to ooze a bit in the process, so I had to wipe it a time or two. This means that you have to prepare them in advance. You don’t want to use them while curing. The one I did the first night lost some of the crisp lines probably due to Tung Oil oozing into the etch a little.
This is how it looks after letting it cure a few days and then etching.
I haven’t used mineral oil yet, so I don’t know if you have to wait for it to fully sink in. Also, does it have an oily residue at all?