I use a Sharpie on all my tip installs,but not as much for looks as the other reasons,but on my own cues I really like the visual effect of a black tip in my sight picture.
No one has ever asked me NOT to.
On regular one piece tips,I feel like it helps inhibit mushrooming esp if you burnish and seal properly after. I don't know why,but it's always worked for me.
It also helps me identify a shaft I've worked on later,in case what tip I put on last time escaped me.
I found out the hard way on my own cues that the Talisman didn't like it.
I always did my own Moori's this way,but prefer to leave the real Moori in their natural,luscious orange. I have had a customer ask me to do his Moori's with the Sharpie though.
Sometimes,one piece tips just won't soak the ink up though,so you have to pay attention.
For on the spot personal maintenance,I burnish the sides with a little spit and a piece of leather I cut out of a wallet that had 20 years of ass wear courtesy of my dad,LOL. I have a coule of different leather burnishers I use on my repair jobs.
Back before I had a lathe,I used that Porper Tip Touch kit for a while,and LIKED it,so it might work for you,and it's reasonably priced. Tommy D.