Ok, one thing thats got me confused. I have to do ALOT of rust repair on my 89 240sx. Its just a project that I want to mess around with. Now for example I need to cut out a peice of the floor and weld in a new sheet. Thats easy though becasue after its welded I can paint the bottom and top.

I also have some rust like in the door jam and the 1/4 panel area. After they are cut out, and now if I weld in new sheet metal, how do I protect the back of the metal? The inside I cant get to with paint, and if i paint it before i weld it in it will burn off anyway.

Any tips here?

 

why cant you get to the inside section? you cant take off the inside panels or what?

 

3M weld through paint or whatever its called. You can google it. I've seen it at almost every auto parts store with a decent body repair/paint section.

 

no, mostly every part that needs to be welded has a support beam behind it, so you cant even see the rust from the inside.

 

Use Aluminized Bioxide weld thru pimer. You apply it with a brush, before you weld in your new pieces.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by I4sillypwr &raquo;</TD></TR><TR><TD CLASS="quote">3M weld through paint or whatever its called. You can google it. I've seen it at almost every auto parts store with a decent body repair/paint section. </TD></TR></TABLE>

He said it, The weld doesn't come out as nice but it does the job!