When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.
I just welded mine, it was a fairly simple ordeal. I did not like the idea of spending money for paint materials and then taking a chance on a bubble forming on a covered hole. It would probably be fine to fill it, just brush some epoxy on the edges of the hole first since drilling the rivits could have removed or scratched the galvanize coating, you don't want any rust starting under the paint.