Had read in various forums that other hobbyists have also used this clay.
For me it was the first time and it was very easy.
Here I had to Chicago- attach screws to the inside (relatively smooth surface) of the helmet to fix the visor.
Material of the helmet: a kind of fiberglass resin mixture
You simply cut the desired quantity (like a sausage :-)) from, and kneads the separated pieces (stands in the accompanying description prima it).
Then you can pass it just fine, spatulas, etc.
But you should not let too much time, because after about 3- 4 min. hardening begins. Thus, the screws have min with me after 15- 20. had a firm grip.
A complete cure (lt. Description) takes place well after 12 hours.
Personally, I am more than satisfied with this kneading epoxy kit and can fully recommend it.