After finishing, the bottom bracket threads may need to be reamed out by some one that has the tool. Clean the threads with Naptha before baking on the powder coat so they will not get clogged.
The plastic fenders can be bent by warming them above your kitchen stove, be careful not to burn them.
Note how the fender holding rods are bent around the disc brake.
I tried spray paint, it was a waste of money and time. Epoxy wood sealer may work a bit better, but a good baked on powder coat job is worth whatever the price is.
Note the second to last photo: The foot can be closer to the front wheel that I showed in the plans.
Think about using moped tires on a bike like this. A 16/2.25" moped tire fits on a 1.25" x 406mm (20 inch) bicycle rim.
These tires are so much stronger than even a BMX tire that I was able to ride to town and back with a load of cargo, at only 7.5 PSI ( I had a slow leak and did not know it). It was very hard with the extra rolling resistance, but that's how strong the side wall is. the tread will last me for years. read more here: http://commutercycling.blogspot.com/2016/01/bicycletires-do-not-do-well-on-really.html