SPRAYMATE HI HEAT PAINTS NOT UP TO STANDARD

I just recently bought a can of Black Hi Heat Spray paint from one of their agents. The paint is clearly marked that it could withstand heat up to 350 degrees Celsius. I have app**** this paint to an electrical unit that does not exceed 170 degrees Celsius as it has a built in thermostat to control the heat. I have tested the thermostat and it is in order. The problem that I have is that there is quite a lot of residue that comes off from the paint after it has been dried properly. I have heated up the item many times over a period of two weeks and every time you would find that residue comes off, more so when the surface is still hot. I have also noticed that some odour comes off when the surface is heated. You would expect that when the paint is dry, there would be no residue or odours and it would be able to handle the heat. To crown it all the paint is damn expensive +/- R140 for 250 ml. I have written to the company and their response initially was that there will be a slight residue after the coating has been done and dried. I explained to them that there is more than just a slight amount and I also questioned whether the product contained lead as the increased amount of residue after it has been heated up, gave me the idea that it could be the case. They rep**** that they would investigate the matter and come back to me. It has been a long while now and have had no response from them. This is not good service.