What is the best

[wisconsinjimmy]

way to fill in the exterior trim holes?

[another2centsworth]

1). Welding
2). Short strand or milled fiberglass filler.
Later, Tim

[Len]

For a quick and cheap method we use the process shown below.



After grinding to remove paint clean then countersink the edge of the hole and apply a "good" aluminum tape then cut the tape so that it lies within the sunken area. Using a rounded tool (like the end of a screwdriver handle) press the tape edge so that it gains maximum adhesion to the metal then lightly scuff the aluminum tape with 80 grit being careful not to tear the tape. Apply the fiberglass filler making sure to press it into the surface so that it will adhere properly then sand and apply body filler to fill the indentation.