Well the welds are actually very clean, there is really only one messy spot where the grill was attached.
The chin strap would have to come out as it was literally strapped to his head only, no adjusting at all.
The blue spot you see is camp foam to pad out the top, OD green on the sides.
The holes were originally to mount a drape I believe, but he at least had measured and they are evenly spaced all the way around.
Are you trying to preserve this as a memorial or build this to your friends Ideal?
Patching the hole will require a good welder and removal of the padding and chin strap.
I think rebuilding to ideal to be used as a cool loaner for newbies with big heads.
If you'd like to do a chainmaille drape I'd be more than happy to make one for you, just tell me what materials and weave you'd like it done in and I'll whip it up for yah
-mongrel-
May be a definite possibility, although I may more need your help in fixing the hauberk when you get here. By the way PM some contact info for you and I'll try and help you get settled as best I can whether your on or off post.
Overall I would just like to revive it and make it a happy helm again if I can.
I will be a Kingfisher of Men.