It’s a fairly thin carbon layer, black, from memory, looks like a std carbon type, sort of Tamca ish. But I don’t know for sure!!, the blade is thin,...
I didn’t mind the Arthur Asia sponge, I’ll be interested to see how you like the Tau II 😁, been thinking of trying it myself!! It’s in the Aliexpress...
Yeah, you gotta be careful !!
When I do boost, I use similar method to yourself, but usually 1 layer glue to protect sponge so G BB GG, or G BBB GG,...