
OCN Members:
Today I would like to talk about "how to paint". In this tutorial I hope to shed some light on alot of misinformation found here and across the web.
FAQ:
1. Do I need to remove all the old paint? NO; if paint was factory applied and is in good condition we will use it for a base.
2. What grit sandpaper should I use? No coarser than 320grit (The number indicates how much abrasive materials are applied per square inch.The smaller the # the coarser the paper)
3. What Brand paint should I use? Most any high quality name brand available in you area. I don't recommend the $0.99 specials.
4. Can I use laquer based paints? Yes. although lacquers tend to dry very fast and that can lead to less adhesion and may not be compatible with non sanding primers. Lacquers can never be used over acrylic enamels as lifting will occur.
5. Do I need to clearcoat all surfaces? NO. If using semi gloss paint on the interior and is prep and applied properly it is not needed. It will just add to the cost. Now if doing a multi color paint scheme on the exterior then YES if you want a smooth no tape line surface. (I will show that here)
6. Do I need to completely disassemble the case to paint the inside? NO. My personal opinion is I think it's a waste of time, plus you will really risk scratching it during assembly. Now don't get me wrong If that's what you want to do then by all means go for it.
7. I have a run in the paint,do I need to sand it all off and start over? NO. I will show an example of this in the pic tutorial.
What I hope to show here is how to complete a high quality job using spray paints. I will also show how to use auto paints in another section. The biggest problem with auto paints is the required equipment and quantities needed.
So lets get started and I will show you step by step just how easy it is to produce quality paint job with great adhesion.
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What you will need:
1. Wax and Grease remover
1a. Cheap 1" disposable paint brush
1b. Clean uncontaminated towels or blue disposable shop towels.
2. 3M gray scuff pad (also called scotch brite pad)
3. 3M green masking tape. (please stay away from cheap tape,you will be a lot happier)
3a. Blue fine line tape if stripes or 2 tones will be applied.
4. Masking material (newspaper or paper grocery bags)
5. Tack rags
6. Non sanding primer sealer
6a. Primer surfacer.
7. Sandpaper 320 or 400 grit and 600 grit (wet-dry paper)
8. Nitrile gloves
9. Disposable spray mask
10. Clean well lit painting area with temps between 60f - 80f. Plan on using area 1-3 days depending on paint scheme.
This should be all that's required in most cases (get it?)






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Preparation:
This is by far the most important step, but can also be the most over thought step. For 90% of most jobs all we will be using is wax and grease remover and the scuff pad.
Step:
1. Clean surface to be painted thoroughly with the wax and grease remover. Using a small container pour in a small amount of wgr and using the the paint brush thoroughly clean all surfaces,dry and repeat. If there are any manufacturing oils left on surface paint won't adhere properly.
2. Now take you scuff pad and thoroughly "sand" all surfaces to be painted. Blow with compressed air if available.
3. Now re-wipe all surfaces with WGR. Make sure you are wearing your gloves from here on out. let dry thoroughly.
4. Now it's time to mask up all areas you don't want painted or painted at this time. If your careful and take your time you can produce a quality job.
5. Now take you tack rags and gently wipe all surfaces to pickup any remaining dust particles.
6. Ok lets apply some primer,for bare metal parts we will just use a non sanding primer sealer. Spray according to label and let flash off.
7. As soon as primer is ready as per label, now we can spray the inside.
I will add more as it comes available.
Hope to start "case giveaway" #2 very soon. I will be using it here for the tutorial. Expect lots of pics and maybe couple videos.
Here's what I got.
Dupli-Color
1-primer sealer
1-primer filler
2-gloss white
1-gloss black
2-gloss clear
Update: Unfortunately Dupi-Color does NOT like to be re-coated after it's dry. When I let the clear dry overnight then sanded it with 600 grit wet prepping it for final coat it lifted (wrinkled) the previous finish. This was very unexpected, even though I read others having this problem.
I setup a test panel, primed, painted then cleared it . Let it dry for a week sanded it re sprayed with same results.
Conclusion: I can not recommend Dupi-Color with clear coat. Even though it works fine clearing right after paint. The problem will be when you have a need to respray it after it's fully cured.
Can you imagine how hard it would be to strip the inside of a case? Now I didn't have that problem when lets say sanding and re spraying the black on black with no clear coat involved.
I hope this will save someone some headaches. I will test other paints in the very near future.

close up

close up

I will need to work on this area after the hammer and dolly work

I opted to use 80 grit to prepare surface for plastic filler. I normally would use a 24 grit grinder but this metal is very thin. Main thing here is to make sure metal is roughed up well.

Here you can really see the low spots.

Back side ready

Any good plastic body filler will work here

Now dab some out of the can.

add the hardener. I used a little more than normal as it's only around 60F at time of application. The more you use the faster it will cure.

Mix thoroughly

When spreading the Bondo make sure you really squeeze it into the metal to maximize adhesion.

Once dry I block sanded it down with 80 grit.

Here I left it a little "high" then switched to 180 grit to smooth out the 80 grit scratches and smooth it out

Once done wipe down with WGR.

ready for primer

I will use the primer filler here to fill the 180 grit sanding scratches.

1st coat

Side panel will also need primer filler since it has a textured finish. here I sanded it smooth with 220 grit then finished with my scuff pad.

and here

Once sanded wipe with WGR and let dry

Here it is with the 4th coat of primer. Make sure you let each coat to dry 5-10 min. I will let this sit overnight before I sand it. Remember primer fillers have to be sanded before top coat.


More to come.

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