I want to fill in (or cover up)some holes in the firewall where all the factory airconditioning was. I realize most of you are thinking why, but I'm not restoring for originality more modified/show. I see firewalls that look as smooth as the exterior body work, and I'm wondering how that is accomplished? Is an entirely new piece of metal welded over the existing, or is each opening weld shut then everything ground smooth?

Most of the time it's the weld in, dolly flat and weld shut method.Have seen the one peice in regular steel and high polished
stainless steel. The later being alot of custom fitting.

Wayne

<BLOCKQUOTE>quote:</font><HR>Originally posted by Frank2:
I want to fill in (or cover up)some holes in the firewall where all the factory airconditioning was. I realize most of you are thinking why, but I'm not restoring for originality more modified/show. I see firewalls that look as smooth as the exterior body work, and I'm wondering how that is accomplished? Is an entirely new piece of metal welded over the existing, or is each opening weld shut then everything ground smooth?<HR></BLOCKQUOTE>

ummm, you can do the welding on metal technique, or you can try to use some fiberglass filler or something like that. most paint stores have fiberglass mat that you can use to cover up the holes, then fill them with fiberglass filler or bondo.