Base Coat Is Bumpy and Rough DIY Tips To Eliminate This Paint Defect


-Hey. This is Donnie Smith. Welcome back to another DIY
Auto Body and Paint Q&A. Today we’re going to talk about
getting a real dry look in your paint and
what you do to correct that if that happens to you. And we’re also going
to talk about how to prevent that from
happening to you. Had a question on YouTube. And what they was asking is
they’ve had this problem, but what to do as far as do they
need to sand it, clear coat it, or re-paint, or wasn’t
sure what to do. So first, let’s talk
about what we’re talking about– dry over-spray. Now, this is
usually the problems that you’re going to
have on large areas. It can happen anywhere,
but it’s going to be more prone to
hood panels and roof panels, big, large areas
that are flat, because that’s usually where the over-spray
comes and lands on top of it. And it’s dry when it hits,
causing a real gritty feeling. I mean, I’ve seen it
as bad in base coat where it looks like someone got
some sand and threw it in it. You know, that bumpy. But on top of panels,
especially in the center where you’re reaching
over and probably you’re further away
than you should be. And that spray’s going
on there real dry. That’s where you’re
probably going to have that. And this can happen
in your base coat, or it can happen in
your primer sealer. I’ve seen it in both. And other things, your
air pressure’s too high, and it have that fog of an
over-spray going all over. And it comes and lands on top. And when it does,
it’s a dry particle. And it kind of makes
that rough texture. Ways to eliminate that are
to check your air pressure, see if you’re shooting at
too high of air pressure. Whenever you’re shooting centers
of hoods and roof panels, make sure you try to
get proper distance. I know sometimes it’s harder. But what I’ll have
to do– sometimes if you’re really leaning over,
getting the center of a hood or something,
you’re going to have to slow your paint
gun down a little bit because you’re further away. Now, another problem is
using the wrong reducer. So if it’s a hot day
like today and you’re using a reducer that dries
fast, obviously, you’re going to have that problem. You’re going to have
that dry over-spray. So use the correct
reducer, don’t use too much air pressure. Be sure and check your
air pressure settings. And try not to
shoot too far away. That’s some of the
causes of that dry spray. So anyway, if you’re having
that problem, what do you do? I mean, that’s
basically the question. So I’ve just painted something. And again, this could
happen in a sealer. Now, if this happens in a
sealer, get some 600 to 800 and sand it out a little bit
in the areas that are dry. You don’t necessarily
have to sand everything. It’s usually spots. But yeah, sand that out and
use a little bit of water just to lubricate. And let it dry off good. Let it dry an hour or
whatever, so it’s not gumming up on your sandpaper. But you’ve got to
lightly sand it, because it is going to be fresh,
just enough to smooth that out. Now, if that dry over-spray’s
sitting right on top, sometimes you can just get a
grey scuff pad and barely rub it, and it’ll rub it all off. So it depends if it’s embedded
into the primer sealer or base coat or if it’s something
that is just sitting on top. You might try a scuff pad first
and see if it knocks right off. If it does, you can continue. If not, you’re
probably going to have to use a little bit of
sandpaper to level it. If it’s in your sealer,
you can sand it out. You don’t necessarily have
to spray additional sealer. I sanded it gently. You can probably go ahead
and put your base coat on top of that. But let’s talk about if this
happens in your base coat. Now, if it happens
in your base coat, I generally recommend to
go ahead and sand it out like we just talked about. Use 800 and lightly sand it. And you could use
a scuff pad, too, to see if it’s just
sitting on top. And then I’ll usually
go ahead and put another coat of base coat. And the reason is,
especially metallics, pearls, if you sand those
just a little bit, you’re going to
disturb the pattern that that metallic or
that pearl was sitting. It’s going to look
different there. You’re going to see
where you sanded. I would do it with any
color, but especially with metallics, pearls, sand it
a little bit until it’s smooth. Then come in, fix the problem–
either less air pressure, the right reducer, or
get your distance right whenever you’re
spraying the centers of the hood or the areas that
you’re having problems at. Get those right,
then put another coat that’s nice and level
and smooth and doesn’t have that texture,
that bumpy feeling. And then put your clear coat on. But that’s just a quick tip. And I hope this helps answer the
question that you had on this. If it’s not, be sure and
leave a comment down here. And I did send you a
little bit of a message, but it’s kind of
hard to say all that and try to describe
what I’m trying to say in the amount of words
that they allow you to have. But anyway, I do thank you
for asking that question. If you have any other questions,
go down to the comments, and you can ask me. And also be sure
to like this video and share with your friends. Thanks for watching, and
I’ll talk to you next time.