- Hey Youtube.
This is Donnie Smith and I'm back
with another Q & A, answering your questions
that you leave me on videos.
Been getting a lot of questions lately,
so I'm on try to help answer some of those
with these video responses.
And this question was about block sanding,
after you block sand something.
What do you do if you find a low after that?
You've already done all your filling.
You've done your body work.
What do you do with the lows after
you find them after you've already primed
and block it?
I'm ona help answer that in this video.
(screeching) (crash and explosion)
Alright.
So, jpboston82 asks,
" Do you ever fill low spots with filler or glaze putty?"
And as always, I appreciate you guys
asking this question,
that's a great question,
and the quick answer, the short answer
is gonna be yes.
You can use glaze putty over primer.
Now, there's some things you need
to do before you do that.
Now before I get there, I am gonna
mention that it's best to have
all your body work done
using glaze putty
and all that before you prime
where you don't have any lows.
But let's face it, we all have some imperfections.
Either pin holes or lows or something
that pops up after it's been primed
on occasion.
Let me give you one hint to help you,
and you may be doing this, but
use a Guide Coat in your body filler stages.
I know a lot of people use it during priming,
but go ahead and use it in body filler.
Spray some Guide Coat or put the
Dry Guide Coat on there.
It comes in two different methods and
it just helps you identify any lows
or things like that before you
get to the priming stages.
So, if you're not using Guide Coat,
be sure and use some Guide Coat.
And that's just something you spray on there.
It's a different color so that if there's
a low or scratch or whatever, that it stays
in that low area and you can identify it really easy.
But, like I said, occasionally
we're all gonna miss some things
so what do we do?
So you've got the Primer Surfacer on there.
You've got it blocked out it, looks good,
but you find that there's a low there.
You can put glaze putty on there
like Metal Glaze.
There's a lot of different brands
but the glaze is designed to go over
2K Cure Primer if it's dried.
But there is something you wanna do.
You may have blocked with 220 or 320.
Most putties on their technical data sheets
say that it should be over nothing
no finer than 180.
So let's say there's a small area
you're gonna have to put some glaze putty,
glaze coat, different people call
it different things.
Let's say there's a small area you're gonna
put that and be sure and sand by hand.
Get a piece of 180 and sand that.
It needs to be 180 or courser
for that to adhere properly according
to the technical data sheets.
So you scuff that up with some 180.
Blow it off, and then you can
apply your putty on there.
And then block that out.
And if I had to apply putty,
you're probably gonna wanna prime
and block one more time.
Now if it's just a very, very minor low,
just one that is not very noticeable,
you could consider just priming again
and blocking it out and seeing if it
blocks out in the next prime.
Sometimes just the mills from that primer
will fill in enough to level that out.
But if it's pretty low, chances are
primer is not gonna fill it.
So you're gonna need to put some more
glaze coat on there, followed by priming
and blocking one more time.
And hopefully after that, you can get it.
Remember after each step, glaze after you prime.
You can use that Guide Coat to help you.
It's just a tool to help you identify
lows and highs and things like that.
And once all the Guide Coat's off,
you know that it's good and level.
Well, JP, I hope that helps answer your question.
If it doesn't, shoot me another message
and I'll try to respond back to that.
And as always, I appreciate you for
leaving this comment, and I appreciate
everybody for watching these videos.
If you like the video, be sure and
give it a thumbs up.
Subscribe to us, and we will see you in the next video.