Hello all i'm a super newbie on this forum after purchasing my first ever new car yesterday - a blue wrx hatch

Before I take delivery I must make the decision wether or not to pay the dealer for the 'protection pack' which im all for doing as I have 2 kids but the price seems a bit steep ($1700 for exterior & interior) although as it's end of financial year they are throwing in reversing sensors.

So my question is am I better off paying to get this titanium paint stuff that's put on with heat guns (suposedly you never polish it) along with the interior stuff they put on (whatever that is) OR would me and a can of scotchguard etc. etc. do the trick just as well? Would certainly be heaps cheaper!