[QUOTE=wbute;71734]Yeah works well hey. Assuming you have no air locks or bubbles and the inside is clean. Good luck on a Holden chassis that's more or less impossible to get a coating on the inside. Heavy rust needs to removed with an abrasive. Difficult inside a chassis. You then have the chassis dipped into a tank at around 400 degrees and then it's quenched. I imagine there could be structural issues after this.
There is an option of electroplating a galvanised coating. I think you will still run into issues with an unclean surface on the inside of the chassis.
Really you are going to find a quality paint hard to beat. Plus getting paint to stick to galvanising is difficult.