I used to swear by spit polishing with cold water, even ice cubes. Then my CSM told us to spit polish with hot water. You know what? It was actually a little better. I think it has more to do with fresh polish (a must), and technique than the temp of the water. Of course, that's oxfords and hair sporran leather, but the principle's the same.
As far as ironing goes - how hard is it to iron a decent crease? Yeah it's a pain in the arse sometimes, but a well turned out uniform takes effort, don't fight it.
Park your butt in front of the boob-tube, pop in a dvd or watch your favorite show, and iron, polish leather, and polich brass....in that order. Stop when you can see your smile in your shoes/sporran and no black comes off the brass your BRASSO-ing. De-lint the day of, with a simple brush (or guntape in a pinch), and voila! Well turned out troopie!