Trouble with the Bunnings is that there isn't much of a colour range to select from.
Even though I've fallen victim to mixing various brands, some of it has paid off.
I've used the cheapest 'undercoat' that Bunnings offer (not grey but white).
Colour that I last tried was 'Montana Gold' range from here http://www.unionheights.com.au/
Has a few advantages over the enamel as it's aimed at Grafitti artists (fast drying, opaque, low pressure)
It was the yellow on the JM-1.
I used 'British Paints' 'Spray Easy' clear gloss (Bunnings) over the top.
It was about $8.50 per can so I used 2 of them.