According to your product shapes,for examples it is complex workpieces or simple product to choose the machine function,for example colo-500star compare with other higher price
Equipment,it not so good when spray the corner or do recoating .
or when spray specially metallic Powders,but for mostly work the colo-500star do good job too.
And according to the coating job details for example need to change colors often or only few colors to choose the box feed unit or hoppers feed unit,and choice the hopper size
2)why some other company supply machine with cheaper prices?
Different machine function,different grade parts choosed,machine coating job quality or lifetime will be different.