For the industrial spray can, i usually use DPI/Anchor brand.
Works the same and extremely cheap!!!
just be careful sometime the metallic paint particle is thick, cant get a very smooth surface...
Rm5-7 per can, 400ml compare to Tamiya/mr hobby spray can which cost RM30 per can, 100ml...
Even if anything wrong happen, just use mrhobby thinner to clean off~~
CAUTION!!! DO NOT, i mean DO NOT EVER try using industrial thinner, model kits surface will melt and here goes your modal kits...!

Personally, i use Mr.hobby topcoat. around Rm30 per can, 100ml.....
still cant find cheaper alternative that can do the job right...

---

Added on September 21, 2010, 7:34 am
I got try to use -->Primer?
but it will become a layer of rubber as undercoat which......well, spoil your models....
So end out spraying without undercoat/surfacer, no problem so far...

If anyone of you want to see the effect of spray can....



That is MG Sinanju Ver Ka normal edition. I use Anchor spray to make it titanium look.

*Silver for inner frame and red pieces undercoat. Then Fire Red on second layer. The black colour i use flat black. Then i use Gaia Star bright gold for the gold line...