Here is a selection (external links) of troubleshooting guides for spray guns, powder coating, gel coating and spray painting equipment in general:

GENERAL

• Lacquer Finishing Trouble Shooting Guide (source: Wood Finish Supply)
• How to free a seized air motor?

GEL COAT

• Gel Coat Troubleshooting Guide (source: Fibre Glast Developments Corp.)

COMPRESSOR

• Air Compressor Troubleshooting Guide (source: McGuire Air Compressors)