Hey Fabo,
I use meguiars polishes and find them very good, i have also used Autoglym when i was was a panelbeater/spraypainter for 5 years both are very good with great results and get the meguiars polishing little sponges to apply polish and the best polishing clothes are terry towels is you or your misses goes to Kmart buy a 10 or 15pack of terry towel nappies bring them home put them in the washing machine wash they with washing power then wash again with a lot of fabic softener then put straight into dryer tumble dry they will they fuff up and are very soft, with the different meguiars grades of polish don't go more then N/o2 it is used for scratches, then N/o7, then N/o9, then yellow wax to finish with also mark with artline texture the number of polished used on clothes and sponges so you only use them for that polish and all of these can be washed in the machine ready for next time.
Cost to get started is not all that bad but will last you for years you will mostly use N/o9 and yellow wax.
anyway hope this is of some help to you.