I got to thinking (dangerous) but possible if use something thick like a layer of grease around the suction cup it may seal enough to pull the dent, then you only have a mess to clean up. It won't take much at all to pull out, siding has the thickness of about 5 sheets of tin foil. Stay away from the dent pullers that use a screw, then you will have holes to seal up as well. Greg
"If I can't fix it, I can screw it up so bad no one else can either."