Hello, everyone.
My name is Brady Haislet.
I'm an application engineer here at 3M.
And today we're going to go through primer application
on this damaged quarter panel.
[INSTRUMENTAL HARD ROCK MUSIC]
Before we get started, you always
want to wear the appropriate personal protective equipment
for the job.
Since we'll be painting today, I'll
be wearing a full paint suit along
with shoe covers, safety glasses, and gloves,
and the respirator I'll be wearing today
is called the PAPR.
Now this video is intended for a professional audience
such as a body shop or a restoration shop,
so if you have any questions about safety or warranty,
you can find that in the description below.
Now let's get this car inside.
As you can see, we had a damaged quarter panel
where we were doing our repair, and where there was a dent,
we applied sand filler and blocked that out to 320.
Surrounding that, we also used a DA
to prep with 600 near the repair followed by 800
further out because we don't want any shiny paint
as we're going to be applying this primer.
And today we chose to do an etch primer followed
by a urethane primer surfacer.
We find that's pretty common in most production shops.
If you have the time, epoxy primer will also work.
Now as we apply this etch primer,
you want to make sure you cover all of your bare metal that's
exposed including any burn through such as what we
have below on this body line.
However, you don't want to overapply it near the filler
because that can cause some problems.
So next, we'll show you how to set up
the spray gun for that etch primer application.
[INSTRUMENTAL HARD ROCK MUSIC]
So we've got the spray gun dialed in for the job.
What I was doing on the paper is dialing that fan knob in
as I went across because I wanted to bring
that pattern down in size.
So I arrived at about a quarter turnout on the fan knob,
and I kept it at about 10 PSI of air pressure.
However, I'm really feathering that trigger
as I apply it because I don't want
to overapply it on the panel.
I've got a setup for the larger area of the repair
where we have more of the bare metal.
However, I will dial it in and close off that fan entirely
to get it as small as possible as I
do the little burn through areas on the body lines as well.
[INSTRUMENTAL HARK ROCK MUSIC]
Now that we're done with the application
of that etch primer, you can see we switched over
to our urethane primer surfacer, and we did that pretty quick
just a minute ago.
But we had a 1.3 fluid tip on our etch primer.
Now we're using a 1.6 on the primer surfacer.
I also forgot to mention that before and after sanding,
you're going to want to clean the panel
with a waterborne and solventborne cleaner, which
we had done prior to shooting the video.
And also while we're waiting for this material to flash,
we can talk a little bit about the masking.
So you can see in the leading edge of the quarter panel,
we've got it back taped, and we have it taped pretty tight
up to that edge.
And we did that same thing here in the wheel arch
as well as down where the quarter meets the bumper.
And the reason you want it taped up close to that edge
is because we're going to be applying some primer to it
and you don't want that primer to travel
too far around the edge because the next couple of layers
of coating need to cover that as well as it saves you
some time in sanding.
Now on the back edge of the quarter,
we rolled the tape over, and that's called back masking.
And the reason we did that is if we happen
to apply that surfacer close to that tape,
it'll create a nice soft edge for us, which
saves some time in sanding.
Let's get the gun set up for the application of primer surfacer.
[INSTRUMENTAL HARD ROCK MUSIC]
We've got the spray gun dialed in now for the primer surfacer
application, and I arrived at about two turns on the fan
just under a 10 PSI on the air pressure.
And I did dial in that fluid knob a little bit,
so I didn't get too heavy in the application.
Now as I apply it, I'm going to make a large area first.
I'm going to cover the entire repair
with a light application, still trying to keep a wet edge--
edge to edge as I went over the repair.
However, you want to make it as minimal overspray
around the repair area as possible.
The next subsequent applications, I
can put it on a little bit heavier,
but I'll keep it contained within what
I applied in that first coat.
[INSTRUMENTAL HARD ROCK MUSIC]
Now that we finished up our three coat
application of our primer surfacer,
we're going to allow that to cure for the manufacturer
recommendation, and then we'll begin blocking
to get the surface level.
Once the surface is level, we will refine those scratches
to what's recommended for the next coating to be applied,
which in our case will be a sealer
and they recommend 400 grit.
We may go even finer in the surrounding areas as well.
That's all there is for this video.
Thank you for tuning in.
Feel free to comment, share, or subscribe as well as check out
in the description there is a link to additional 3M Collision
Repair Academy videos.
Thank you all for watching.
I'll see you next time.
[INSTRUMENTAL HARD ROCK MUSIC]