Under hood heater box repairs

[gmc684x4]

Are most ppl on here rebuilding and patching the under hood fibre glass heater box?
are most guys giving the outside a new top skim coat of resin ?
are marine rated fibre glass kits better then the auto stuff ?

I looked through some of my trucks looking for a better one then the one in my 72 today going through missing parts inventory for getting her running again

[Richard]

Unless you have a desire to keep your original I see no reason to repair it. I would bet you can pick up another from the parts board for a reasonable cost. If you would like to post a want to buy add a subscription is required.

[Richard2112]

I repaired mine but only because I wanted to make a two piece assembly. For the amount of work involved, you be ahead to buy a new one.