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Tuesday, 11 January 2022 19:41

Toby Chess Shares Best Practice Documents for Collision Repairers

Written by Toby Chess
Among the many SOPs Toby Chess is writing for auto body shop use is one on how to handle used sheet metal, like the door seen here. Among the many SOPs Toby Chess is writing for auto body shop use is one on how to handle used sheet metal, like the door seen here.

Index

...contaminate the pin and it will not stick. I told the tech to make sure the pin was perpendicular to the metal.

 

I asked the manager if he would like a best practice sheet on the proper steps needed for aluminum stud installation and removal, and he said sure. He also said if there was a problem, he would call, which he never did. I have included this best practice as an attachment.

My third example deals with plastic repair using adhesives.

 

Recently, I received a call from a Kent Automotive sales representative. One of his shops called and told him the bumper repair they performed failed.

 

I made an appointment with the shop and I arrived a couple of days later. I asked the gentleman who repaired the bumper what steps and products he used. He gave an abbreviated version and I explained I needed the step by step process he used.

 

He said he removed the paint from the front side of the bumper with a 120 DA sander, but not the back side. He then cleaned the front and back side of the bumper with Prep-Sol.

 

I explained to him that using a solvent-based wax and grease remover is designed to remove adhesives. The solvent will wick into the raw plastic and when the adhesive is applied, the solvent wax and grease remover will not allow the adhesive to stick. I explained a water-based wax and grease remover needs to be used.

 

I also told him he needed to sand the backside with 80 grit DA to abrade the plastic so the adhesive would adhere to it. He showed me the product he used for the back side, which was the wrong material. He used another manufacturer’s product for the front, and that manufacturer requires an adhesion promoter before the application of the adhesive, which he did not use.

 

We went into the shop and I did a clinic on plastic repair. He brought me a water-based wax and grease remover from a different manufacturer. I explained to him...


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