First of all, if this is the wrong StackExchange site for this question, I'm sorry. (If someone could point me to the right one, please do so!)
So in this DIY YouTube video, the person makes some sort of spot welding device. (I'm not sure if it's "truly" a "spot welder," but it's the term he uses, so I'll just go with that.) If I made it using the same materials/components, what kind of eye protection would I need to use it safely? I only know a little about oxyacetylene and arc welding (I've done those before, and I wasn't good at them) and I think an arc welding mask would be overkill and regular lab goggles would probably be unsafe/insufficient.