Chris Author
I don't know how to handle the soft rubber the kit is made of. Regular plastic glue doesn't work. Neither does white glue. Even superglue didn't help. I've always been able to clean the surface with my fingernails, but there's no noticeable effect. My last attempt today was UHU Kraft, a heavy-duty adhesive.

Villiers de Vos
A sharp scalpel blade perhaps?

Chris Author
Not cutting is the problem but the glue.

gorby
Maybe try Araldite. It's my go-to glue when nothing else works.

Villiers de Vos
Seems that you found a solution? Coming along nicely.

Chris Author
The last glue: UHU hart worked best. Next challenge was the color. Vallejo model color doesn't stick. I can peel it off easily with my fingers. But that's ok, it will only be a static model, not a gaming item.