These:
Are good for that. The biggest one is the one you'd use. You glop some hardener-mixed bondo onto the spreader and then press hard while dragging it over the putted areas. Those gaps are big enough to be "bondo" fixed. Spot putty is only for pin sized holes.
Cereal's video on smoothing is a great way to see how it's done.
It's a long video, BUT at 12:00 is the start of the bondoing, watch from there and you'll see him using the spreader to fill in crevasses in the armor.
The gist is that you need a spreader to make sure the bondo gets applied as flat and evenly as possible.
As a side note. The spot where you have the big hole in the second pic is where mine was on my ODST, I figured it was from setting the helmet upside down, pushing that part in before the fiberglass had fully hardened. It may take a few layers to build it up enough to be on level with the rest of the piece. You also might have too much bondo in other places, and need to sand them closer to the paper. This can be a bit rough as if you put too much bondo on in the first place, it's a lot more you need to sand through, and it might be easier to just fill in the large pits instead.
Are good for that. The biggest one is the one you'd use. You glop some hardener-mixed bondo onto the spreader and then press hard while dragging it over the putted areas. Those gaps are big enough to be "bondo" fixed. Spot putty is only for pin sized holes.
Cereal's video on smoothing is a great way to see how it's done.
The gist is that you need a spreader to make sure the bondo gets applied as flat and evenly as possible.
As a side note. The spot where you have the big hole in the second pic is where mine was on my ODST, I figured it was from setting the helmet upside down, pushing that part in before the fiberglass had fully hardened. It may take a few layers to build it up enough to be on level with the rest of the piece. You also might have too much bondo in other places, and need to sand them closer to the paper. This can be a bit rough as if you put too much bondo on in the first place, it's a lot more you need to sand through, and it might be easier to just fill in the large pits instead.
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