by Don Peers
Adam Bozic, 1997 - Photo courtesy of David Seitzinger
The steps listed below must be followed to insure proper adhesion to the plastic derby
bodies. In following these steps, you will have enough material to do 2 or 3 cars. It
would be a good idea to do cars in a group with others, cutting the cost per car down.
Step 1: Wash the body, inside and out, with hot water and SEM soap part
#39362.
Step 2: Using a gray scruff pad (3M part #7448) clean the body with SEM
brand plastic prep, part #38354. The scuff pad is only used for cleaning purposes, you
should not sand the body. Sand scratches could show up in the final finish. Do 2' square
areas wiping the plastic prep off before it has a chance to dry by itself.
Step 3: Repeat step 2.
Step 4: Spray the body with one light to medium coat of SEM flexible
adhesion promoter part #39863. Let the adhesion promoter dry at least 15 minutes but no
more than 30.
Step 5: Use a flexible primer of your choice it will take several coats
to fill the pinholes in the body. The body is very porous.
Step 6: Use the topcoat of your choice. If you use an automotive finish,
you must use a flexible additive in the paint. Ask your paint supplier for instructions to
refinish flexible parts. The instructions may vary per paint brand.
SEM Products, Inc can be reached at 704-522-1006 for a free catalog.
