Greetings. I'm on a mission to make as many different masked heads with different facial expressions as I can for the Hydra soldiers both regular & big sized. For this custom, I used the head from the Marvel select Spiderwoman base that has 3 Hydra soldiers with full sized 6' scaled heads. I boiled water for 3 min & dumped the Hydra fig in it for 30 secs to soften up the head for my exacto blade. I then used my dremmel to make a hole in the neck to accommodate the Hydra neck peg. I sanded down the area then sprayed the head with grey primer spray. Waited around an hr for it to dry, then just used Citadel Caliban Green for the mask & Citadel Mephisto Red for the eye lenses, then some citadel Cadian flesh for the unmasked face. Now I have 3 Hydra grunts with 3 different head sculpts. Working on another Enforcer head custom which I hope to have up by the next few days. Thanks for looking.