We try to produce minis without massive hideous mould lines, flash, vents, air bubbles or other things that cause you a headache. But, try as we might, we are not (yet!). So simply run the part under a hot tap or use boiled water to heat and soften it.
The "1/12 resin bust model pilot unpainted unassembled" would be best suited for model enthusiasts looking for a detailed and high-quality plastic model of a pilot, ready to be painted and assembled.