Random stuff from my granddad's place

I feel if I am never going to finish going thru all the stuff at my grandparents/parents house. I am trying to date the gulf oil cart and the hood tire sign. I really love the hood sign and this can actually fit in my house! My real question is are the Whitmoyer Roose Paint and the other thingie just trash or do people collect this stuff??? We have been donating so much but I don't want to donate trash to some organization.