Some gun oils and aerosols will eat rubber over time and some plastics, just be aware of this (petroleum distillates for propellant, or has "detergents"). mixing graphite with a light grease works well, but is probably overkill for this app since you're cleaning every other event. The plastic bolt in theory should not gall the aluminum. I remember Muddy mentioning seeing grooves from a JCS hex cut bolt though so take that with a grain of salt