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Re: [Shop-talk] Paint sprayers

To: shop-talk@autox.team.net
Subject: Re: [Shop-talk] Paint sprayers
From: Bob Spidell via Shop-talk <shop-talk@autox.team.net>
Date: Sun, 3 May 2020 10:23:01 -0700
Delivered-to: mharc@autox.team.net
Delivered-to: shop-talk@autox.team.net
References: <OFE5CAD8D7.AC486773-ON8525855D.005C1ADA-8525855D.005CDB47@mail.megageek.com>
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Others, with more experience and, maybe, a 'pro' will offer advice, but 
we--my father and I--were in the same position a few years ago. I bought 
this kit:

https://www.harborfreight.com/professional-automotive-hvlp-spray-gun-kit-94572.html

and we used it to paint a fairly valuable old British sports car (it 
came out OK, not great).  We used a one-stage paint; I'd have to go to 
the shop to find out for sure, but I believe it was one of the DuPont 
brands, not top-of-the-line, but not cheap either.  I'd only painted one 
car before, a junky Subaru Brat, and this was my first use of HVLP.  My 
impression of the HF paint gun is that it's a competent tool for the 
price, but it was trial-and-error for me.  I got quite a bit of orange 
peel, maybe because I used insufficient pressure at the gun; my dad said 
that one of the paint dealers told him we should 'crank the pressure 
up,' apparently the Low Pressure part of HVLP was more for environmental 
reasons than getting a good coat of paint.  If you watch the pros on the 
TV shows they pretty mug 'fog it on;' and since you probably don't have 
a booth and you're painting outdoors or in a shop wait for a 
no/little-wind day with no insects around, and wet the floor and the 
walls to keep dust down,

You'll want to put a oil/water separator inline after the compressor 
tank, and whatever gun you buy, be sure to put a filter and a pressure 
gauge at the gun; something like this: 
https://www.homedepot.com/p/Husky-Spray-Gun-Filter-Kit-HDA11900/305171973 
Practice on old sheetmetal, plywood, whatever you've got lying around to 
get a feel for the gun.  As always, preparation is 90% of the job; sand 
down to bare metal if you can, if not at least sand down to primer or 
the last really good coat of paint, then use one of the spray cleaners 
like this:

https://www.eastwood.com/ew-pre-painting-prep-aerosol-11oz.html?SRCCODE=PLA00020&gclid=EAIaIQobChMI9LXhh5qY6QIViPhkCh3c4ACIEAQYBCABEgIaE_D_BwE

and a microfiber cloth.  Use a primer/sealer if you don't go to bare 
metal, or and epoxy primer if you do (esp. if you have to let the job 
sit in primer for more than a couple days).  Sand the primer down to 600 
or 800 grit, apply one or more coats of base color--with no more than 20 
minutes between them--let dry for a couple days then wet sand until 
you're happy with the finish.  Finish off with successive applications 
of finer grades of liquid polishing compounds.

Also stumbled across this (note I didn't read it, it just looked 
useful): https://tcpglobal.com/pages/paint-problem-solver ; There's lots 
of videos online (Kevin Tetz has some good ones).

Good luck.

Bob

ps.  There's always a 'learning curve.'


On 5/3/2020 9:54 AM, eric--- via Shop-talk wrote:
> Ok, so "Sandford" by big work truck is currently undergoing some major 
> body work and will be getting new paint.  Both myself and my buddy 
> haven't painted a car since the late 80's.
>
> I see there are many different type of sprayers out there for 
> automotive finishes.
> There are the traditional sprayers with the can under the gun (and 
> what I already have and used in the 80s.)
> Then there are HVLP sprayers with the cups on top.
> I also noticed these types seem to be the new norm...
> _https://www.harborfreight.com/64-oz-professional-hvlp-air-spray-gun-kit-62895.html_
>
> So, here are my requirements.  I am painting this truck, which is a 
> work truck and does NOT need an awesome finish. I also don't mind 
> buying new tools.
>
> So, do I spring for the 'pro' model HF?  I will most likely not be 
> painting another car for a decade (maybe) so I don't think I need to 
> get into real pro brands and pay top dollar. But I may paint here and 
> there, NEVER for show, just for work stuff.
>
> Or, do I paint with the old style I already have?
>
> What is the advantages?  Is there any learning curve?
>
> Thanks!
>
> Mule
>
> "Be as beneficent as the sun or the sea, but if your rights as a 
> rational being are trenched on, die on the first inch of your 
> territory." Ralph Waldo Emerson
> -Who is John Galt?
>
>


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    Others, with more experience and, maybe, a 'pro' will offer advice,
    but we--my father and I--were in the same position a few years ago. 
    I bought this kit:<br>
    <br>
<a class="moz-txt-link-freetext" 
href="https://www.harborfreight.com/professional-automotive-hvlp-spray-gun-kit-94572.html";>https://www.harborfreight.com/professional-automotive-hvlp-spray-gun-kit-94572.html</a><br>
    <br>
    and we used it to paint a fairly valuable old British sports car (it
    came out OK, not great).  We used a one-stage paint; I'd have to go
    to the shop to find out for sure, but I believe it was one of the
    DuPont brands, not top-of-the-line, but not cheap either.  I'd only
    painted one car before, a junky Subaru Brat, and this was my first
    use of HVLP.  My impression of the HF paint gun is that it's a
    competent tool for the price, but it was trial-and-error for me.  I
    got quite a bit of orange peel, maybe because I used insufficient
    pressure at the gun; my dad said that one of the paint dealers told
    him we should 'crank the pressure up,' apparently the Low Pressure
    part of HVLP was more for environmental reasons than getting a good
    coat of paint.  If you watch the pros on the TV shows they pretty
    mug 'fog it on;' and since you probably don't have a booth and
    you're painting outdoors or in a shop wait for a no/little-wind day
    with no insects around, and wet the floor and the walls to keep dust
    down,<br>
    <br>
    You'll want to put a oil/water separator inline after the compressor
    tank, and whatever gun you buy, be sure to put a filter and a
    pressure gauge at the gun; something like this:
<a class="moz-txt-link-freetext" 
href="https://www.homedepot.com/p/Husky-Spray-Gun-Filter-Kit-HDA11900/305171973";>https://www.homedepot.com/p/Husky-Spray-Gun-Filter-Kit-HDA11900/305171973</a>  
    Practice on old sheetmetal, plywood, whatever you've got lying
    around to get a feel for the gun.  As always, preparation is 90% of
    the job; sand down to bare metal if you can, if not at least sand
    down to primer or the last really good coat of paint, then use one
    of the spray cleaners like this:<br>
    <br>
<a class="moz-txt-link-freetext" 
href="https://www.eastwood.com/ew-pre-painting-prep-aerosol-11oz.html?SRCCODE=PLA00020&amp;gclid=EAIaIQobChMI9LXhh5qY6QIViPhkCh3c4ACIEAQYBCABEgIaE_D_BwE";>https://www.eastwood.com/ew-pre-painting-prep-aerosol-11oz.html?SRCCODE=PLA00020&amp;gclid=EAIaIQobChMI9LXhh5qY6QIViPhkCh3c4ACIEAQYBCABEgIaE_D_BwE</a><br>
    <br>
    and a microfiber cloth.  Use a primer/sealer if you don't go to bare
    metal, or and epoxy primer if you do (esp. if you have to let the
    job sit in primer for more than a couple days).  Sand the primer
    down to 600 or 800 grit, apply one or more coats of base color--with
    no more than 20 minutes between them--let dry for a couple days then
    wet sand until you're happy with the finish.  Finish off with
    successive applications of finer grades of liquid polishing
    compounds.<br>
    <br>
    Also stumbled across this (note I didn't read it, it just looked
    useful): <a class="moz-txt-link-freetext" 
href="https://tcpglobal.com/pages/paint-problem-solver";>https://tcpglobal.com/pages/paint-problem-solver</a> 
 There's
    lots of videos online (Kevin Tetz has some good ones).<br>
    <br>
    Good luck.<br>
    <br>
    Bob<br>
    <br>
    ps.  There's always a 'learning curve.'<br>
    <br>
    <br>
    <div class="moz-cite-prefix">On 5/3/2020 9:54 AM, eric--- via
      Shop-talk wrote:<br>
    </div>
    <blockquote type="cite"
cite="mid:OFE5CAD8D7.AC486773-ON8525855D.005C1ADA-8525855D.005CDB47@mail.megageek.com">
      <meta http-equiv="content-type" content="text/html;
        charset=windows-1252">
      <span style=" font-size:10pt;font-family:sans-serif">Ok, so
        "Sandford"
        by big work truck is currently undergoing some major body work
        and will
        be getting new paint.  Both myself and my buddy haven't painted
        a
        car since the late 80's.</span>
      <br>
      <br>
      <span style=" font-size:10pt;font-family:sans-serif">I see there
        are
        many different type of sprayers out there for automotive
        finishes.</span>
      <br>
      <span style=" font-size:10pt;font-family:sans-serif">There are the
        traditional sprayers with the can under the gun (and what I
        already have
        and used in the 80s.)</span>
      <br>
      <span style=" font-size:10pt;font-family:sans-serif">Then there
        are
        HVLP sprayers with the cups on top.</span>
      <br>
      <span style=" font-size:10pt;font-family:sans-serif">I also
        noticed
        these types seem to be the new norm...</span>
      <br>
      <a
href="https://www.harborfreight.com/64-oz-professional-hvlp-air-spray-gun-kit-62895.html";
        moz-do-not-send="true"><span style=" 
font-size:12pt;color:blue"><u>https://www.harborfreight.com/64-oz-professional-hvlp-air-spray-gun-kit-62895.html</u></span></a><span
        style=" font-size:12pt">
      </span>
      <br>
      <br>
      <span style=" font-size:10pt;font-family:sans-serif">So, here are
        my
        requirements.  I am painting this truck, which is a work truck
        and
        does NOT need an awesome finish. I also don't mind buying new
        tools.</span>
      <br>
      <br>
      <span style=" font-size:10pt;font-family:sans-serif">So, do I
        spring
        for the 'pro' model HF?  I will most likely not be painting
        another
        car for a decade (maybe) so I don't think I need to get into
        real pro brands
        and pay top dollar. But I may paint here and there, NEVER for
        show, just
        for work stuff.</span>
      <br>
      <br>
      <span style=" font-size:10pt;font-family:sans-serif">Or, do I
        paint
        with the old style I already have?</span>
      <br>
      <br>
      <span style=" font-size:10pt;font-family:sans-serif">What is the
        advantages?
         Is there any learning curve?</span>
      <br>
      <br>
      <span style=" font-size:10pt;font-family:sans-serif">Thanks!</span>
      <br>
      <br>
      <span style=" font-size:10pt;font-family:sans-serif">Mule</span>
      <br>
      <span style=" font-size:10pt;font-family:sans-serif"><br>
        "Be as beneficent as the sun or the sea, but if your rights as a
        rational
        being are trenched on, die on the first inch of your territory."
        Ralph
        Waldo Emerson <br>
        -Who is John Galt?</span>
      <br>
      <fieldset class="mimeAttachmentHeader"></fieldset>
      <br>
    </blockquote>
    <br>
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