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Old 02-22-2013, 03:21 AM
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Small scale military restoration - spray gun advice.

This is not car related at all but since it does concern spray painting I thought I might be able to gain some advice.
I am in the process of restoring my German, WW2, Lafette 42 tripod back to its original colours. The base coat is going to be a couple of coats of red oxide then on top there will be a couple of coats of RAL7021.
Therefore, I have a few of questions.
I am looking at one of the Ebay cheapo specials either a mini or a full size gun.
1) Since I am using 50:50 mix on the red oxide and RAL7021 cellulose paint would it be okay to use a mini gun with a 0.8mm needle or would I need to up it to a 1.2mm or larger, remembering that the finish does in no way have to come close to that of a pro, civvy vehicle.
2) Since the area to paint is mainly comprised of tubes, and or similar (see image below), then would a 0.8mm nozzle give sufficient spread for my needs?

Below is the tripod that I'm restoring, everything in green will be redone:

Cheers,
Tom.


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Old 02-22-2013, 06:51 AM
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WOW...looks dangerous...the red oxide your talking about is lacquer primer...correct? I'm not familiar with the viscosity of RAL 7021, but from what your saying, a 1.2 tip should work as long as you can thin out the RAL 7021 if you need to. The red oxide is thin and you may need to turn your volume in but will apply all the primer you need,,,I think that if you take the gun apart to paint it, a touch up gun will work fine...and cost less as well.

I wouldn't be concerned about fan and needle size, and spray pattern...the pieces are so small any pattern that a 1.2 tip gives you should work.

Ray
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Old 02-22-2013, 07:02 AM
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I would use my regular gun..I suppose you will paint the pieces and then assemble it..

Sam
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Old 02-22-2013, 07:17 AM
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Originally Posted by OneMoreTime View Post
I would use my regular gun..I suppose you will paint the pieces and then assemble it..

Sam
I agree with you...if it was me painting the piece of artillery I would use my regular gun as well. The OP however is looking at buying a cheap paint gun from Ebay...I just thought that if this was a one off...a touch up gun would do the job for him and be cheaper as well.

Ray
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Old 02-22-2013, 07:26 AM
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One of the harbor freight purple guns would be fine..I have one that does a nice job..bought it to try as a lot of the guys were talking about them..They are not very spendy..

Sam
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Old 02-22-2013, 08:19 AM
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Ray,
The red oxide is actually not compatible with the cellulose/lacquer paint as it needs to be mixed with White/Mineral spirits so I realise I'll have to go steady and dust the first layer or two of the cellulose/lacquer paint so as not to blister it.
Both paints as they stand, i.e. unthinned, are of a similar viscosity.


Sam,
The main reason why I was looking at the touch up gun is because the tripod will be sprayed stripped down so the majority of parts are no wider than about an inch and a half.

The mini type I'm looking at is one of THESE.

The full size is one of THESE, which I think is a spit for one of the HF guns.

The mini types are cheap and it will be only a one-off show.

Tom.
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Old 02-22-2013, 08:36 AM
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I would be concerned about the compatibility of the materials..I would be looking for a primer that is comapatible to the paint..Sometimes guys doing restorations make issues for them selves in devotion to perfection..

Sam
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Old 02-22-2013, 08:46 AM
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"The red oxide is actually not compatible with the cellulose/lacquer paint as it needs to be mixed with White/Mineral spirits"

"..I would be looking for a primer that is comapatible to the paint.."

+1
those two paints will not work well together, blister like paint stripper.
the mini-type spray gun you linked to will work well for this.
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Old 02-22-2013, 08:49 AM
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Sam,
As far as paint compatibility goes, I will be doing some extensive tests for which I've already painted up some steel plate in varying thicknesses of red oxide.

Tom.
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Old 02-22-2013, 09:01 AM
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If you haven't already bought the red oxide, or even if you have, you may save yourself a lot of aggravation by using a catalyzed epoxy primer and then top coating it with your RAL 7021...This way you get protection and if you buy the epoxy that can be sanded you can use it as a build primer and get rid of any imperfections in the metal...just a thought.

Ray
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Old 02-22-2013, 10:53 AM
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I'd get a mini spray gun, like this one for example Mini Detail Touch Up HVLP Spray Gun w 1 0 Tip Auto Car Paint Spot Repair | eBay
I once sprayed entire bumper cover on my daily driver with it.
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Old 02-27-2013, 02:26 AM
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69,
Thanks for the advice. I won't be getting rid of any imperfections as this is a piece of 1943 German hardware and the imperfections are what make it what it is.

Mitmaks,
Thanks for the link.

Tom.
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Old 02-27-2013, 05:08 AM
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Quote:
Originally Posted by Tommygunn View Post
This is not car related at all but since it does concern spray painting I thought I might be able to gain some advice.
I am in the process of restoring my German, WW2, Lafette 42 tripod back to its original colours. The base coat is going to be a couple of coats of red oxide then on top there will be a couple of coats of RAL7021.
Therefore, I have a few of questions.
I am looking at one of the Ebay cheapo specials either a mini or a full size gun.
1) Since I am using 50:50 mix on the red oxide and RAL7021 cellulose paint would it be okay to use a mini gun with a 0.8mm needle or would I need to up it to a 1.2mm or larger, remembering that the finish does in no way have to come close to that of a pro, civvy vehicle.
2) Since the area to paint is mainly comprised of tubes, and or similar (see image below), then would a 0.8mm nozzle give sufficient spread for my needs?

Below is the tripod that I'm restoring, everything in green will be redone:

Cheers,
Tom.


HOLY CRAP, That is a MG44 used by the german army late in WW2.

The American troops hated it because of it high rate of fire.
Do not paint it!!!

It has way more value in it's origonal form/finish.

Do you have any extra barrels??? those got changed out due to high rate of fire in the heat of battel. It took like 5 seconds to change out the barrel.

I Repeat, DO NOT PAINT IT. You will destroy the value.

That gun would spit out 1200 rounds per minute.

It belongs in a musium...
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Old 02-27-2013, 07:35 AM
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Techron,
You didn't read my original post did you?

I am restoring the tripod.

It is an MG42 used by the German army from late 1942 onwards.

"I Repeat, DO NOT PAINT IT. You will destroy the value".
What can I say, as the owner of a genuine 1944 Gustloff Werke MG42, 1943 Lafette 42, Mgz34 optic and accessories.

I have no spare barrels and it is a UK deactivated weapon.

It definately does not belong in a museum where it would get a nice sheen of rust and a covering of dust. Museums generally do not give a monkeys about their stock. The best stuff is in private hands where it is well cared for.

Tom.
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Old 02-27-2013, 08:03 AM
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don't know how anal you are going to be with paint match, (do you have the formula, or playn by ear) BUT..
have you thought of a diy powercoat set up..
the tripot parts will be small enough to bake in a oven..
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