i`m with out a doubt a novice body man. i have been practicing body work on a spare door for my 50 ford.my problem is that i took all the paint off the door,spead body filler,sanded, and repeated till my arm fell off and primed with spray can filler primer.the panel is smooth but i can still see where i put my filler. should i sand the primer and re prime? should i mix some sealer primer and shoot? what should i do? i`m trying to figure it out before i move onto the real deal.