do not touch the airbag at all..
if anything happens...the insurance co will try to find ways to not reimburse you ur money...

for the interior...imo...just take it to a shop that do vinyl wrapping..you get to choose your own colors and theyll wrap it for u....

if u really want to paint the parts yourself...contact SEM...
they make OEM interior paint colors and a few colors of their own..
ive done about 3 interiors...and i advise you to buy ur colors in pints...it should be cheaper...
use spray paint guns to do it and youll be happier with the results...
also buy their clear coat as well...

the prepping...imo...dont sand it...there are cleaning formulas out there that'll clean up ur vinyls and plastics...no need to sand...
just make sure you paint in a dust free booth and have plenty of time to let each part dry...

if you take your time...it'll take about a week of labor...