I did some wire wheeling to clean rust on the underside of my car and the rust was so bad it just made a hole in the metal. I would say the hole is about 1.5 inch by 3/4 inch by 1/2 inch deep. Can I just plug / fill the hole up with Nu-metal?

Also, would I apply Rust seal before or after Nu-metal?

Thanks

Yes. NuMetal can fill that hole.

You will want to prep the metal with AquaKlean and RustBlast. Apply 2 coats of RustSeal. Patch the hole with the NuMetal. Then apply another coat of RustSeal.

You can find complete instructions for RustSeal here: http://www.kbs-coatings.com/RustSeal-Information-and-Instructions_ep_38-1.html

You can also find the Fix-It Guide which will help you quickly identify the causes of and the recommended solutions for the most common issues that could occur with RustSeal here: http://www.kbs-coatings.com/fix-it-guide-rustseal.html

You can also find Instructional Videos here: http://www.kbs-coatings.com/KBS-Videos_ep_90-1.html

You can also find a Flow Chart for using the KBS 3 Step System here: http://www.kbs-coatings.com/Flow-Chart--RustSeal-on-Steel_ep_87-1.html