When I put a new bottom coating on my '82 Fish-Rite,I used a product called Coat-it. It is similar to Glove-It but has Kevlar and graphite in it. It is also dark gray,almost black. it has held up very well. Check it out. It is about the same $.

I installed a 65# thrust MinnKota on the DB. They are great for boondoggin' and work well for plug pullin' too. It does take some practice. It has a 42" shaft which is about right,40' would be fine too,but not much less. My unit is a 24 volt which requires two batteries. I don't use full thrust much except for blasting thru frog water so the additional weight doesn't pay for itself. Two batteries gives you longer life but after a full day on the river, I rarely draw down more than 25% on each cell. If I did it again,I would get a 12 volt at around 45-50#.