I am starting the rust repair on my dads 914-6. I was going to replace the rear trunk pan but now I am not so sure. It has many tiny swiss cheese holes in it that I can weld up and grind down. Would it be better to do that or replace the trunk pan?

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It would probably be faster to just cut out the whole area and weld a new piece in.

I'd get a new one. Fix it right. It's a six!