Yeah the white bolts were the give away
. Some people say painting can work but you never hear them come back with a long term report 12 months down the track to say if the paint is holding up so i would be interested to see how these hold up. There would need to be a the liner inside. If you can get one that works in plastic then your set. Anyone can spray a tank with plastic primer and flex additive in the paint but if you have no liner on the inside, it will still eventually bubble. Reports out of US are that Caswell has a liner that works in plastic tanks and a few guys are having good results with that.