Great job with using what was at hand for you.

If you want to experiment more in the future, I will recommend Aervoe camo paint. I followed Pat Roger's lead (and method, on lightfighter forum) and it paid off handsomely with a well camo'd rifle to suit my AO coloring. Aervoe colors are specifically well suited for camouflaging equipment.

Paint : http://dsgarms.com/Category/43_1/Paint.aspx

As a side note, use some sealer when finished because, as all paints do, chipping will occur.