Re: Getting Started

[Matt Haas <mhaas@xxxxxxx>]

Mark,

3M's weldable primer can be used to prevent rust but you're not supposed to 
put body filler over it. It's best just to use it in the area where you'll 
be welding and then remove any extra after you're done welding. This stuff 
is also very expensive (I think the last can I picked up was $20 or more) 
so you really don't want to go nuts with it anyway.

If you're going to bast the entire engine compartment at once, I'd go ahead 
and hit it with decent spray bomb primer and paint (I've had good luck with 
DupliColor products) -- just primer will result in rust (it's hydroscopic, 
just like brake fluid). Grind away what you need to fix a particular area, 
do the metal work and re-spray.  Once all of the metal work is done, you 
can get rid of the cheap stuff and spray on a good epoxy primer. One of the 
paint companies is now recommending to apply the filler over the primer (If 
you get or can get your hands Auto Restorer magazine, there have been a 
bunch of paint and body articles in it this year -- a Rustang is being 
restored). You can also pick up a cheap paint gun to spray primer but you 
really need a fresh air system to spray epoxy or urethane primers or paints.

For removing paint where you don't want to blast, the 3M Roloc discs work 
great. I use 2" and 4" sized pads and I can get into just about anything 
with them (buy them in bulk, you'll go through them pretty quickly but they 
are a huge time saver). I also like flap discs better than grinding wheels. 
They cut faster, run cooler, and are easier to control than a grinding 
stone. DeWalt makes very thin 4" cut off wheels for angle grinders that are 
good for long, straight cuts.

Matt

At 09:14 PM 11/7/2005 -0500, you wrote:
> That's the answer I was looking for! I was not aware that 3M had a 
> weldable primer.
> I knew someone made it because my friend uses it when he installs door 
> skins. I just haven't had a chance to see him in a while.
>   Now to actually work on the thing!
> --
> Mark Price
> markprice242ATadelphia.net
> Morgantown, WV
>
>
> ---- JOE FULTON <piper_pa20@xxxxxxxxxxx> wrote:
> > Mark,
> >
> > If you are gonna store the car inside while you are
> > working on it, I think you could just put spray bomb
> > primer on the bare metal to fend off the rust while
> > you're doing repairs.
> >
> > You might also want to use a weld through type primer
> > like the 3M brand.  I use it and it seems to work.
> >
> > If the car will be exposed to weather while it's being
> > worked on, I would use a good rust treatment on the
> > bare metal and then spray the areas with two-part
> > epoxy primer.  You'll have to remove the epoxy from
> > your active work areas to do any more welding, but at
> > least you won't be causing more damage by letting rust
> > take over.
> >
> > Just my opinions but you asked.
> >
> > Regards,
> > Joe Fulton
> >
> >
> >
> >
> >

mhaas@xxxxxxx
Cincinnati, OH
http://www.mattsoldcars.com
1967 Rambler American wagon
1968 Rambler American sedan
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