Wow, just saw this topic, better late than never as someone, somewhere might have said.

Looks crisp and clean BE! as the Duck points out, you need to protect from burn "splatter" and keep the paint away.
#1 is really easy as I have not had trouble with either the blue tape or regular masking tape to keep splatter under control.

#2 really depends more on the wood type and what you are filling with.
Open grain woods (oak, ash, etc.) like to bleed anything, everywhere, Really impossible to get a good surface seal with tape, probably betterĀ  to seal with shellac and try the tape over that.

I've had colored epoxy fills follow the pores and seep out the back with some open gain wood.
Closed grain stuff (cherry, maple) is a real joy. Even and sharp edges with no leakage.