Have used my pirate costume, prop weapons and various DIY prosthetic over several Halloween years, with black and white hair spray, home made syrup blood and custard puss. Peckers the frisky parrot joined in the party spirit to pull in he other birds. (Mainly as tend to be broke at this time and had the costume).
The eye was boil prosthetic with the centre cut out. I made a plaster cast of a Plasticine boil sculpture. Some custard for pus, syrup blood and lots of black and white hairspray.
The skinned look was some condom rubber, cotton wool and latex ans some tissue with syrup food dye blood.