I've totally stripped down my syncro to it's bare shell.  poor naked syncro.

I've been  grinding off some, using phosphic acid on other, outside seam
rust was tackled with and exacto knife, some dental picks and the dremel.

But there's one spot i can't reach to treat "properly"  it's on the inner
rear wheel well.  I was going to weld plates in to reinforce this area much
like on the
syncro 16"

http://busman.be/afbeeldingen/wpb9efd996.png

but i'm afraid to do this without treating it properly.  It's nearly
impossible to get to now, and if i do weld in plates, it'll never be touched
again.

so wht are my options?

I know the vanagon world seems to be huge fans of por-15, and that's how I'm
leaning, but i'd like to get some opinions before ordering some.