zinc oxide or etch primer?

[steve_k]

evening folk's.

right then, over the weekend i'll be cutting out the old "jacking pads" on the car & welding in new metal.

now what i would like to know is which primer do i need to use??

zinc/red oxide primer?? or etch primer??

thanks for any help folks.

[maxfield]

David's zinc 182 primer.

[redcar]

zinc primer and red oxide are different.
Some people will tell you that zinc primer "flakes" off but if done properly it is actually very strong. The new metal has to be keyed appropriately, thoroughly de-greased and then sprayed lightly with the zinc primer. It forms a chemical bond rather than solely forming an adhesive bond as etch primer will. Keying the surface when using zinc primer massively increases the surface area of the metal and helps the zinc primer bond to/with the metal.

I'd personally use zinc primer. Using etch primer isn't so much of a problem but is normally only preferred over zinc primer on visible bodywork repairs. I'd much rather use zinc or etch primer than red oxide.

Remember to use a quality underseal as opposed to a schutz type.

[steve_k]

cheers guys.

got to go to the local parts depot to get some decent underseal.

wish me luck with it all

[redcar]

cheers guys.

got to go to the local parts depot to get some decent underseal.

wish me luck with it all

good luck, take lots of pics

[G-Bear]

good luck, take lots of pics

+1 to this.. would be good to see some photos..

Good luck