I've now had a go at using some solder paste and heating it to the required temperature using hot air.

Turned out fairly neat. I did have trouble working out what temperature worked though. The resister was done with air at full blast and it almost got blown off the board. I dialled it down on the LEDs, but they then seemed to have trouble reflowing the paste, even at 350℃ (must check how hot it REALLY is though).

I might try the skillet method next. I think that may give the best and easiest results for SMD ICs.