I'm also a fairly new owner of a (slightly older) sprint. I'm working a steep learning curve on the mechnical side of things but thankfully nothing has gone wrong in that department... so far. Mite want to carefully inspect the loom, eapecially around the battery, for wear & tear.
Bodywork wise, these are the things that i have dealt with and might be worth looking out for:
- check the fit between the guttering seal and the underside of the bonnet air vents is good. Mine wasn't and when it rains water collects beneath the battery, heater, brake servo e.t.c and leaks into the footwells; corrosion and wet feet follow. Both are sorted but could have been a lot worse.
- you may have already done this but it's worth lifting up the carpets in the boot to check for corrosion. I was cleaning out the rear wheel arches to shutz them and found a bit of corrosion on the left hand side one next to the fuel line. All the metal around was rock solid, but a bit more investigation and cutting dead 'metal' away left a hole from which when looking up from under the wheelarch, you could see straight out through the boot
Was mainly not structural so luckily with a good bit of welding (courtesy of my dad) and plenty of seam sealant it's fine. Fair bit of surface rust but as long as an eye is kept on it, shouldn't be a problem at all.
General advice is to check stuff as often as poss. trust me, prevention is better than cure! Other than that, enjoy. Looks like a good car and if mine is anything to go by will be a hell of a lot of fun