- In this video, we're gonna talk about,
what is the epoxy primer window time?
(text whooshes)
Hey, this is Donnie, and I had a question on YouTube
that I wanted to answer.
I know it's been a while since I've been on here,
and I'll talk about that in just a little bit,
but I wanted to answer one of these questions
as I get back into trying to get
to some of your questions here on YouTube.
It says, from Kalina7259 asks,
"I'm slowly diving into painting,
or primers and paints on my first VW Bug restoration.
I'm considering the epoxy, but wanted to ask what happens
if you don't spray over the epoxy after 72 hours?
Would it corrode?"
Okay, that's a good question, 'cause in this video,
I was talking about, you got that 72-hour window.
And it will not corrode.
If you leave it outside for a long period of time,
it may corrode, 'cause primer does not,
it does absorb some moisture,
but if it's in a shop, it'll last for a long time.
But the window is talking about, when can you re-spray?
So basically, every product has its own window.
Epoxy usually has a longer one, like 72 hours,
the epoxy I use.
Your brand may be different.
It may be a little shorter, or it may be longer.
Some of 'em are a week.
But what that means is that is the time period
that you have chemical adhesion.
So if you spray your epoxy, you have 72 hours,
or whatever that window is, to come back
and put more coatings on without having to sand.
If you go past that 72 hours,
you lose that chemical adhesion,
so you're gonna have to provide a mechanical adhesion,
and you do that by sanding.
So, no, it's not nothing about it corroding
or anything like that.
It's just how long you have
where you still have that chemical adhesion
and you can spray something on it without sanding.
Now, you said you're doing a restoration.
I highly recommend, I would use epoxy.
Any restoration job I would use epoxy
'cause it's the best for that type of job.
Self-etch is better for smaller items,
something, maybe production work.
But, I don't know exactly what all you're doing with this,
but if you're gonna sandblast it, have it blasted,
I would come back immediately.
And remember this, you don't want to touch that metal
with your bare hands after it's blasted,
'cause that metal is kinda porous, and it'll start rusting.
Your fingerprints will rust where you touched it at.
So use some type of gloves, rubber gloves
or something to handle it.
Get it all sprayed,
even before you repair any dents or anything.
Get it all sprayed in epoxy, and then you can come back.
And this is not a fast production type job,
so you're probably gonna be
doing it as you go, restoration's slower.
So, at that point, you can, if you're working on a dent
and you need to remove some epoxy primer,
then you can repair that dent.
You can remove the epoxy primer, repair the dent,
do what you need to do, and get it repaired.
So, if you're not sandblasting,
I would still get it down, get all the surface rust off,
or whatever you need to do.
I'm not sure what all you need to do to this Bug,
but I would use the epoxy primer,
and then continue the process,
all the dent repair and all that.
And then you can put more epoxy primer on that.
But remember, anywhere you didn't sand,
if it's been six months since you worked on it,
you will have to sand that
before you put anything on top of that,
even if it's more epoxy primer,
or whatever, primer-surfacer, what you're putting on.
You will need to sand that so it has that adhesion.
So, that is the 72-hour window.
Flash time is basically
how long you need to wait between coats.
Putting one coat, how long do you need to wait
to put another coat?
Window is how long you have
before you can put another coat on without having to sand.
A lot of base coats are 24 hours. They're not as long.
So, let's say you, it was 10 o'clock at night,
and you got the base coat on.
If it's a 24-hour window,
you know that you can come in in the morning
and apply your clear coat without having to sand it.
So, that's what the window is.
Now a little bit about what's going on with me.
So, in the last video,
I talked about I'm moving to Colorado, Denver,
and that was, I had a lot of junk at the house,
had to sell a lot of stuff,
and moving is just very difficult
when you're moving out of state.
So that kept me tied up.
I didn't have time to really do any videos.
I usually, in the summers
is when I really do a lot of these videos,
but I didn't have time this summer.
And then I had the move.
Soon as I moved here,
this is a new program we're starting,
and having to order tools,
just everything, students showing up.
And of course, right now, we are doing it all online
with Zoom meetings, and very time-consuming.
Takes more time to do it online than it does in person.
So yeah, everything brand new, school district,
of course we use different everything,
different online learning systems.
So I'm having to learn all their ways.
I'm having to start a new program, and been tied up.
But hopefully here before long,
I'll be able to get back on here
and start creating some more videos
and answering more of your questions.
But I do want to give you all a kudos, a thank you,
because even though I've been out,
you have still been watching my videos.
The views have not went down.
So you're still watching my videos.
I think I'm at
about 98.5 thousand subscribers.
So, getting real close to that 100,000 mark,
and that'll be exciting when I get there.
So, thank you all for watching.
So anyway, that is it for this video.
I hope that helps answer the question.
If not, be sure and leave another comment below.
Thanks for watching, take care,
and we'll see you in the next video.