Rick, I have used Bondo, and or JB Weld with good results. I fill deep dents with the JB, and then a layer of Bondo on top. With smaller dents, I just use straight Bondo.
I rough up the area with a coarse sandpaper, and then make sure it’s good and clean. (brake cleaner).I put the Bondo or JB Weld on, and then use a palm sander for large areas. Use 220 grit to start, then 400. After it’s smooth I hit it with glazing putty, and sand again with 400. Then a coat of self etching primer. After the primer dries another round of sanding with 600, and your last coat of primer before topcoat paint.
This is the method I used on the 10HP Johnson below. It has worked well for me.
I’m sure others will chime in.
Bob D
