Void Walker General
There are no modifiers, positive or negative, for advanced age. Heroic badassery is not diminished by grey hairs.
Armour of any kind takes one minute to don, minus your character level in rounds down to a minimum of one round. High level characters are just that good, or possibly learn to cope with wearing most of their armour even out of combat for extended periods of time.
Improvised weapons only cause their wielders to take a nonproficiency penalty if they are not proficient with the weapon they are trying to emulate. Therefore, a character that is proficient with a shortspear can use a pitchfork, and a character proficient with a greathammer could use a wheel and axle.