When i first looked at the pictures i said to myself "tiles look nice" then i scrolled down :D
Looking even better :)
I remember last time i did my grout/sealant... bunch of small cuts and headache :D
Nice, i know Red/Black combo is used everywhere but its so sweet when powder coated :) the hard part is to pick which parts are red/black :)
Dont forget after pic when you finish :)
I would try more-cut pad, but maybe you can also find someone near you( and AG member :D ) that details cars. Nothing like a pro showing you some tricks. Although seeing a pro in action wont make you a pro it will show you the proper way of working on your car.
Just my $.02 :)
Looks like yours is totaled, i hope insurance company doesnt screw you over. Make sure you visit a doctor for your back, accidents related injuries can be tricky and appear after few days/weeks. GL to you, keep us posted.
-Marc-