The blow out trip

I get that from your post earlier about the binding strength of the compound however, as I stated, the old holes don't match up with the new fender as also seen in the photos I sent (and one that I couldn't seem to get posted).  My question was more pointed toward if I could just use that as a hole filler without the fender mating to it.  I've decided that my fender will be held with screws and the double stick tape to hold it in place while I put the screws in, just like at the factory.  Will I be more diligent about making sure my tires are good?  Of course, but if the worst should happen again, I really don't want to replace a large hunk of my camper wall.  This particular blow out trip only has ended up costing me about $300 in tires and replacement hardware and fenders and such.  I would have had to dip into my comprehensive deductible had there been more damage to the sides of the camper than there were.

That is correct.