Anyone have a personal preference on what type of sharpies or markers to use to add some coloration or minor changes while on the water? I've been seeing guys make changes to cranks but I'm unsure of what they're using and what truly lasts/works for a decent amount of time before coming off of the bait.

I use the scent markers.  They work AND stink pretty. 

I just read an article Mark Rose wrote about this subject.  He said he uses "waterproof Sharpies" to change colors on his baits.  The Spike It markers work great on soft plastics but I've never tried them on hard baits.

I use the scent markers. They work AND stink pretty.

Who makes these?

Spike-it makes the scented markers.

 

Do-it makes paint markers and jig molds.

 

You can also get paint markers at hobby lobby,make sure to print off a 40% off coupon,which will makem alot cheaper.