Sharpening NAP Spitfire mechanical broadheads
I am shooting NAP Spitfire mechanical broad heads. Though I like the initial performance, I can’t keep them sharp. I emailed NAP for advice on sharpening the blades and they told me to buy the replacement blades. That would be a good option if they were fairly priced. Any ideas on sharpening? I usually have success with a sharpening stone, but not with these.