Shaping and Forming Seat Foam

How do you guys go about trimming seat foam and still maintain a smooth contour?

Electric fillet knife. You can then work it further with a sanding block depending on the type of foam.

I have never done it myself but I have heard to use an electric carving knife like the one you would use on your Thanksgiving turkey and then final shape the foam with a serrated metal wood rasp similar to the old cheese grater in your mom's kitchen drawer...

The electric carving knife is amazing for shaping. Find a piece of scrap foam from an old baby crib mattress and practice first. You could even use it to add foam if you take too much off. Aerosol adhesive/glue that's safe for foam can be used to keep it situated while you install your cover.

See where my seat dips down for the rear fastener?

Use 3m super 777 adhesive to form your cover special areas to form cover to foam.

Yes electric knife and new straight razor blade for fine work.

Also, works good is to keep cover warm when stretching. With hair dryer. So when it cools it shrinks little for tight fit.

Another is to use a hand 5" or 6" rotary sander set at high speed. The vibrating makes it real smooth

Thanks guys, great advice. I'll post pics of the process.