Hey looks good- Yea you have to grind down through thoe welds.. essentially you want it so that you can run your finger down the door jamb and not have it bump over stuff. Be carefull when grinding to not grind too much of the very outer area, beccause it has the welds that hold the side panel on. (once you start grinding and look at it youl probably see what I mean. Also, you might want to grind it down and then primer it like you did to the rest of the cowl..since the front is steel, you dont want to grind it down and leave it bare.
AARG I want to learn to paint so I can just do my own.....on that subject, what finish are you going for for your paint? Show quality...or trail or imbetween (who is doing it, you?) and also, im sure you have seen the lines on the alum tub from the inside welds that have to undergo a generous amount of body work to be smooth...are you doing that yoursself?
Eli