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  Mustangsandmore Forum Archive
  Tool Time
  Undercoating guns

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Author Topic:   Undercoating guns
SteveLaRiviere
Administrator

Posts: 48752
From: Saco, Maine
Registered: May 99

posted 10-13-2005 07:20 PM     Click Here to See the Profile for SteveLaRiviere        Reply w/Quote
Does anyone have any recommendations on a decent undercoating-type gun I can use to spray paint and other substances like cosmolene inside body panels and frame members? I'd rather not buy anything from Chinasupply, I've bought too much crap from them in the past. TIA

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'70 Mustang Mach 1 351C 4V/FMX/3.25 Open
'70 Mustang Convertible 250 I6/3 speed/2.79 Open
'72 Mustang Sprint Hardtop 351C 4V/FMX/4.30 Trac Loc
'94 F-150 XL 5.8L/E4OD/3.55 Limited Slip
'05 Mercury Sable LS 3.0L DOHC 24V Duratech V6

lonewolf
Gearhead

Posts: 419
From: Colorado; M&M #3117
Registered: Jul 2003

posted 10-14-2005 10:38 AM     Click Here to See the Profile for lonewolf        Reply w/Quote
Steve,

Drop Len Stuart a line over at autobodystore.net ([email protected]) and talk to him about what you need and have for a compressor setup. He has good prices and great service.

Cheers,

Rick

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Lonewolf
1968 Coupe in Pieces
99 1/2 F250

SteveLaRiviere
Administrator

Posts: 48752
From: Saco, Maine
Registered: May 99

posted 10-16-2005 07:24 PM     Click Here to See the Profile for SteveLaRiviere        Reply w/Quote
Thanks. I might even just make one with what I have here.

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'70 Mustang Mach 1 351C 4V/FMX/3.25 Open
'70 Mustang Convertible 250 I6/3 speed/2.79 Open
'72 Mustang Sprint Hardtop 351C 4V/FMX/4.30 Trac Loc
'94 F-150 XL 5.8L/E4OD/3.55 Limited Slip
'05 Mercury Sable LS 3.0L DOHC 24V Duratech V6

2FarGone
Journeyman

Posts: 97
From: Kent, Oh,
Registered: Nov 2004

posted 10-19-2005 11:03 AM     Click Here to See the Profile for 2FarGone        Reply w/Quote
quote:
Originally posted by SteveLaRiviere:
Thanks. I might even just make one with what I have here.



Shouldn't be too hard, depending on what type of undercoating you want to shoot.

One place I worked years ago had an undercoating service. The systems used were little more than large air powered grease gun drums.

ddenton749
unregistered
posted 10-19-2005 11:16 AM              Reply w/Quote
Steve,

I'm curious. I am under the impression that the current thought on undercoating is that it's a bad thing. Doesn't it provide places for dirt and moisture to accumulate and start rust? Neither my 91 Fox nor my 93 Explorer are undercoated, and there is no sign of undercarriage rust. On my 73 I decided to go with only seam sealer and paint on the underbody components. My thought was that with fewer places for moisture to hide, the quicker the car would dry out after it was wet, and the less chance for rust to start.

Tell us your thoughts on it.

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'73 Convertible, 351C 2V
'91 LX Convertible 5.0
Member: Valley Forge Mustang Club
"The best things in life are free, but the really kick-a** things cost a fortune."
My Site

SteveLaRiviere
Administrator

Posts: 48752
From: Saco, Maine
Registered: May 99

posted 10-19-2005 07:15 PM     Click Here to See the Profile for SteveLaRiviere        Reply w/Quote
I wasn't planning on spraying undercoating, I was thinking of paint for areas like in the structure of the trunk lid, and cosmoline down the frame rails and rockers panels. I just thought an undercoating gun might be a good delivery system, but after giving it some thought I realized I needed a gun with finer orifaces because of the thinner viscosities.

I think undercoating is a tossup. A heavy coat prevents undercar rock chips which are the beginning points of rust often, but if you are blocking drainage holes and channels you are doing yourself no favor. And if you plan on working on the car at all, undercoating is a huge PITA. It destroys the value if you plan on it being a collector car, as well. I'd use it on a winter beater I'd drive on salty winter roads, though.

------------------
'70 Mustang Mach 1 351C 4V/FMX/3.25 Open
'70 Mustang Convertible 250 I6/3 speed/2.79 Open
'72 Mustang Sprint Hardtop 351C 4V/FMX/4.30 Trac Loc
'94 F-150 XL 5.8L/E4OD/3.55 Limited Slip
'05 Mercury Sable LS 3.0L DOHC 24V Duratech V6

mellowyellow
Gearhead

Posts: 8198
From: So. Fl.
Registered: Aug 2000

posted 10-20-2005 12:52 PM     Click Here to See the Profile for mellowyellow        Reply w/Quote
Somewhere in my old Musstang Magazine collection (the ones out of print) there was an article about a guy in Nebraska (I think) using a garden tank sprayer to shoot etch primer into the rockers, etc. He was completely undercoating all the inside parts he could on a 65 fastback. It wouldn't be too hard to "rig" an extension that had flexibility to shove it into out of reach places. Those sprayers are so cheap that you could afford to pitch it rather than clean it up.

SteveLaRiviere
Administrator

Posts: 48752
From: Saco, Maine
Registered: May 99

posted 10-22-2005 09:42 PM     Click Here to See the Profile for SteveLaRiviere        Reply w/Quote
Excellent suggestion, Pete. I'll take a look at them.

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'70 Mustang Mach 1 351C 4V/FMX/3.25 Open
'70 Mustang Convertible 250 I6/3 speed/2.79 Open
'72 Mustang Sprint Hardtop 351C 4V/FMX/4.30 Trac Loc
'94 F-150 XL 5.8L/E4OD/3.55 Limited Slip
'05 Mercury Sable LS 3.0L DOHC 24V Duratech V6

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