I've used resin tracks before and the best method I have found for wrapping them around the suspension is:
1. Assemble the tanks suspension.
2. Assemble all the links you will need for a total run (it's a guess at first, but don't worry if you guess wrong. If you need more, add the sections, if you need less, just cut away what you don't need.).
3. Test fit the track on the tank. I usually start at the last tooth on the drive sprocket and then mark with a pencil where the first "curve" will form. I usually start with the top run, but this is not necessary.
4. Use a R/C Model Airplanes Covering Heat Gun to heat just the section at the first curve.
5. Quickly place the track section on the tank and hold the track in place around the curve.
6. When the track sections have cooled (they cool pretty quickly), mark with a pencil where the next curve will be.
7. Repeat steps 4 through 6 until you are all the way around.
Don't fret if you get the curve wrong. Just reheat the section and go again.
One word of warning though. There is also a glove sold with the R/C supplies which will help to protect your hand while you are covering with the heat gun. It's a good idea to have either one of these or something to protect your hand from the heat. The R/C Heat guns go up to 400 degrees F.
As far as painting them goes, I leave the tracks where I can lift them off and paint them after they have been "bent" to shape.
I hope this helps. Good Luck!