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1975 300 Restoration Painting

852 Views 13 Replies 5 Participants Last post by  ron_white
Got my frame, fender pan, and motor mount's back from the powder coater was good price and the finish looks great. I'm trying my hand at using an HVLP spray gun. I have so far two coats of primer with sanding taking place between coats. I used 600 grit paper. First question how many coats of primer should I go with? Second should my between coat sanding be with a higher grit paper like 1000 grit? Thanks all!!!
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If you're going for a show finish the use of a guide coat is necessary to show high and low spots. High build primer and block sanding can level the panel if these areas are not too different in height. High build primer allows the use of coarse sandpaper to level out the panel and is then followed by finer grits to ready the panel for the topcoat.
Too smooth = less grip between coats.
I'm looking more along the lines of durability and long term protection If I'm able to get it looking show quality then thats great. I'm using Valspar Restoration Series Paint HVLP Gun I bought at lowes and Valspar Hardner with 8-1 ratio as stated on the bottle.
Andre I went with 400 grit between coats I did two coats of primer and I guess I will do two top coats. The primary coat seems to be allot thicker then the primer. I will be taking the day off today to give it a good 48 hours to dry before resuming. I gotta take some picture sand post them too. Thanks guys!
Usually I use 360 or 400 after the primer then 3 coat of paint.
For the paint I used JD Synthetic Enamel with JD Thinner at 10:1 ratio then Valspar REN3001 at 8:1 ratio.
The JD paint and the Valspar Restoration Series are probably the same product or very similar.
Read all instruction carefully.
When they said to add the thinner slowly, don't cheat with that one, now I know what is paint separation.
After the mix is done you must wait 20 to 30 minutes before using it.
After every coat, I prepared the next batch quickly because the next coat must be applied before 30 minutes.

I didnt use a paint thinner in the mix hmmm I noticed some of the parts have areas where the paint is not as deep a green as other areas. So I will get some thinner into the mix as well the paint did seem sort of thick not a fine mist as I had thought it would be. What pressure should I have the Spray gun set at I used 29psi as per the gun makers instructions for use. Also you didnt mention drying time between coats so should I just recoat one after the other? I got some pics and one close up.
Some new pics my son (6yo) wanted to help during the sand blasting process so we fitted the mask and he helped clean up one of the engine shields.
It's hard to see in a photo I tried taking a couple but the paint seemed thin or clear in some places like I said earlier. Well learning as my son and I go it's allot of fun!!!

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Its too humid here today to paint I feel 80% to 90% hopefully it will rain and cool things off so I can paint tomorrow maybe I will do some wet sanding tonight.
It appears your mix is too thick. Thinner reduces viscosity and allows the paint to flow as a fine mist. Pressure at the gun should be measured with the trigger pulled.

Yes I alway's recoat one after the other.
Usually you touch the paint, if it's tacky but don't stay on your finger, you'r ready for the next coat.

But with the hardener the timing is tight.
They said every next coat must be applied when it's tacky but also before 30 minutes after the previous one.
But the hardener need 20 to 30 minutes to set before the mix can be used (mix again before application).
For this reason the batch for the next coat must be prepared as soon as possible after each coat.

For the pressure, I was told it's different for every gun and paint used.
My local Dupont distributor have a kind of machine to set your own gun with their paint.
Maybe your Valspar distributor have this kind of machine.
To adjust mine, I tried different pressure and adjustment with water to practice.
Of course with the paint, those adjustment are different but with the previous experimentation I was able to find a good setup quickly without wasting too much paint.

Also a tacky rug can be use to remove all dust before painting.
They are available at most paint dealer.

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Wow you guys have just reinforced in me that I am just going to keep giving my green pieces to my guy to do the powder coating.

That is just way too much work for me!

Thanks for the tips I will follow them as soon as some of this humidity leaves Central Maryland
I sometimes feel that way myself I had a total of four parts done that way, but I know in the long run a will value it more if I do it myself. Also it's good for my son to see that with a little or sometimes allot of effort depending on how you look at it will result in a job well done. Going to get some thinner today and misc nuts bolt's odd and ends.

I admire your determination and your thoughts of teaching your son is important as well !!

Unless one is very lucky on the first attempt or even the first few attempts at painting, there are going to a few messy jobs to clean up due the learning process. We have all been there !!

I have twin boy at just over 4YO and they already like to help out. For them, just grabbing a wrench or something that I need, makes them feel like a big helpers and with my praise they get big smiles and want to do more !!

After all, we are going to need someone to take over the Deere herds someday !!
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