I'm doing some body work for the first time. I have a few blemishes in the car
one is in the driver door behind the mirror its a crease like something thin hit it or like something dropped on it there. and then the other side has some rust spots i'm removing but the metal is deformed a little from something its just bumpy hard to describe but it has valleys i need to fill

anyway since these are not just dungs what do i use to fill them i'm not looking for showroom here or i would replace the door which i might do later. i'm just painting the car flat black and want it not to be complete crap.

I heard never use bondo ok fine there are so many other brands and types. I heard something about bondo with glass i dunno some are better for light dings other for heavy. I would rather not have to use 3-4 types of fillers also where can i find the filler you recommend.