Body Work Help

Ok, i'm rather new to body work and paint. I shaved the box holes on my dads Ford 350 long box. now when i shaved them i stripped the paint around the the stake pockets and welded them up, used kitty hair on the first coat then filled them with a lightweight filler then sanded them down with 180, 220, then 400 till the were smooth,then i roughed up the old paint to get the clear off and stuff then sprayed it with primer, now that the primer is dry i can still see some ripple around where the edges of the bondo are and other area that i fix, my ? is what r all the right steps to get it perfectly smooth, should i strip it down to metal?, Thanks everyone

go over it all with a sanding block

Yea use a sanding block and feather it out

ok, another ? , when i aply my bondo i'm only doin a small area around where i shaved, should I completely cover the top rails where i shaved so i'm sanding the whole surface down level

applying the filler should be done to bare metal.. I have been taught to start roughing it to shape with 40 grit.. then 80 and then 180... 24 to prep the surface first tho to remove the paint. go about 4 inches beyond the repair.. apply your filler and sand it with a block f