Mike
Only the area covered by the repair panel is sprayed with the zinc spray
(Cold Galvanizing Compound; they make a spray and a brush on application,
available through Eastwood: www.eastwoodcompany.com). If you are going to
spot weld over such an area you would spray the edge onto which you will be
laying your panel. The panel will have about 3/16" to 1/4' holes drilled
every 4 to 6 inches for spot welds. Lay the panel over the edge to be
welded to after spraying it, and mark where the holes are. Then remove the
panel and grind just that spot. Spray the underside of the panel with the
holes. Reposition the panel and begin spot welding. You can push down the
edge of the panel with a large screwdriver to get a tight contact while
welding; this means you don't need the temporary rivets you may have heard
about.
If you are welding a bead along the edge of the panel you still spray the
zinc coating, but you must grind it off just where the weld will be. I
would again lay the panel over the sprayed edge, mark with pencil along the
edge of the replacement panel, remove panel, and grind back about an eighth
of an inch for the weld on the edge to which you will be laying your
replacement panel. You want the metal bare where welding, however I have
seen experienced welders weld a bead through paint.
You might consider purchasing the video from Eastwood titled: "Car Bodywork
repair by welding" by The Welding Institute Video guide 3". You can never
get too much information.
Best wishes,
Mike Ross
'67 Spitfire (soon to be a Spit 6)
'66 Spitfire
'69 GT6 (parts car)
'70 GT6
----- Original Message -----
From: "Michael D. Nugent, Ph.D." <nugentmd@gte.net>
To: "Mike Ross" <mikeross@Prodigy.net>
Sent: Sunday, September 03, 2000 10:41 AM
Subject: Re: Floorpan repair
> Is this zinc coating applied PRIOR to welding (after taking other paint
off)?
> That is, can you weld through it?
>
> Mike
> Renton, WA
>
> Mike Ross wrote:
>
> > Mike,
> >
> > I just finished a couple of welding classes at our local vocational
school
> > after work. From what I've learned at school and from an Eastwood video
on
> > auto body welding, I would attach the patch from above. First, however,
> > make sure you've removed all paint,etc. from the areas to be welded.
You
> > can further protect from rust by spraying on a zinc coating made for
this
> > (sold by Eastwood). After welding from below using a series of short
1/2
> > inch lengths of bead every 6 inches or so and repeating till all open
seams
> > are welded, go to the top side and do the same. That way you have
totally
> > protected the weld from rain water below and wet carpets above. The
zinc
> > coating gives added protection.
> >
> > Good luck,
> >
> > Mike
> > '66 Spitfire Mk2
> > '68 Spitfire Mk3 (soon to be a GT6 convertible)
> > '69 GT6+ (parts car)
> > '70 GT6+
> >
> > ----- Original Message -----
> > From: Michael Nugent <nugentmd@gte.net>
> > To: Spitlist <spitfires@autox.team.net>
> > Sent: Friday, September 01, 2000 1:49 PM
> > Subject: Floorpan repair
> >
> > >
> > > Getting ready to do my first MIG welding - repair of the driver's
floor.
> > > Does it make any difference if I attach the patch from the bottom or
from
> > > the top? (I'm thinking more about water accumulation than strength.)
> > >
> > > I intend to cut a piece from another car that's 1/2" bigger in all
> > > directions than the hole I cut out, so there will be overlap.
> > >
> > > Mike
> > > Renton, WA
> > >
> > >
> > >
>
> --
> Mike
> Renton, WA
> >>--------------> 914 Lite 2.5 is FOR SALE:
> http://home1.gte.net/NugentMD/914lite.htm
>
>
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