Painting Zed

It has been a very busy couple of weeks. I had taken a block of days off work for a camping trip in Hapy, but with Boo's arm, that was not going to happen, So, instead of a road trip and corresponding post, today I will cover what I DID do those days: take several major steps forward on getting paint on Zed, the 1979 Datsun 280ZX. Apologies for the late post. I finished painting yesterday, and I am back to work today. So, while this is a day and a half late, there's a lot to cover.

Priming Body Kit 

end state

Recall the last post about Zed, I was fitting and wrestling with the fiberglass body kit. I got the gaps set, and panels attached with bolts. I described the effort on the rear bumper and the side skirts, but did not detail the front bumper. While it did not seat as well as the rear, it was not as much trouble as the side skirts either. Similar to how I filled the gaps on the skirts and rear bumper, I matched the height to the side skirts and then set the spread on the front bumper. Similar to the others, I shot cooking oil into the gap, cleaned the fiberglass, applied Bondo, removed the bumper and sanded the Bondo smooth. After sanding, I repeated the process a couple of times to get the front bumper to sit as well as the rear. Once the seams were as good enough, I set the panels on that old blue tarp with the replacement driver fender, and shot them with the black urethane primer I used on the rest of the body. That was day one of my vacation.

Sanding Party

Ah yes. The fun of sanding. The more you prime, the more you get to sand. I had the 5 panels, and they sanded down smooth with 320 grit, eventually. I discovered, however, that if I started with 120 grit and did just a quick pass on the panel before shifting to the 320 the finish was as good or better, but it took far less time and material.

final priming shoot

Of course, I re-sanded the rest of the body too. Why? Well, I got a little overspray from the priming onto the passenger side of the main shell. Since the doors, hood and tail gate were still on, the tiny dried paint bits made a difference. There was a slight sandpaper edge on the whole car. It only took an hour or so, to sand it back smooth but it all adds up. Next time, I'll cover things with an extra tarp.

Next, I prepared for paint by removing the hood, doors and rear tail gate. I arrayed them on the blue tarp with their less-likely-to-be-seen sides up. My plan was to paint these areas first and then paint the flip sides when I shot the rest of the car. This plan was a good one in that I got to learn the feel for my new paint gun (Atom x27). As before, I disassembled and cleaned that gun with lacquer thinner and then re-assembled with a "larger" 1.4mm tip. I quote larger because 1.4 aint so big. This was where my day 2 ended.

First Spray with Color

hood underside shot

I am continuing to use Eastwood paint material, and chose a base-coat / clear coat urethane combination. For color, I am shooting "9mm" grey. The paint has very small metallic flake on a medium grey base that appears to have a touch of olive green in it. The olive green sub-color is not apparent in online images, but it does appear after it has been applied.

This first day of shooting was focused on body parts that mostly won't be seen: the insides of the fenders, the side skirts, the bumpers, the insides of the doors, the underside of the hood, the inside of the rear deck lid, the radiator supports, around the engine bay, the hidden parts of the headlight buckets and the door jams. The first coat laid down extremely well in the over 33C (92*F) heat. When I shot the second coat, however, I could not see the material hit the panels very well. Between wrestling with my glasses, which were fogging up from my sweat, to sweat droplets on my glasses, all aggravated by my lack of direct light on the panel.... lead to a dry-spray effect on most of the panels. The under side of the rear deck lid and radiator support were mostly spared, but the others had varying effects. So, the next morning, I chose to sand the bumpers, door jams, and door-insides planning to re-shoot them when I did the rest of the car.

In the background of the rest of the pictures, you will see that Boo and I added side walls to the Harbor Freight car ports. I ordered 2 8' x 20' walls from TentAndTable. They attach with clips, and, because they are 20 feet long, they can be used in different configurations around the 20' x 20' covered space we have. After the end of my final day of shooting paint, we shortened them to 10' long on the sides to allow air flow (after the surfaces flash-dried) to let the fumes out. These walls did a great job of keeping the light and temperature consistent while also preventing dust and bugs from drifting in.

Side Skirt Install Fun

pop rivetted

Before I could do the rest of the painting, I wanted the side skirts installed. Of course, that meant that the fenders were re-installed first. I mounted the headlight buckets to the fenders, and installed the fenders with M6 bolts. The side skirts had been held in place during the Bondo cycles with M4 bolts through the panels into the side of the car. I did not want to repeat that for the finished work.

I had hoped that the epoxy would hold well enough that I could remove the bolts and the panels would hold in-place just from the strength of the epoxy. I was not so lucky. Both the contact cement I used for carpeting the speaker box and the clear goop stuff that delivered with the panels failed. So, I cleared the goop and tried again with the goop and then, once the goop had set up, I replaced the bolts with pop-rivets. Of course, once the side skirts were on, the fenders are now effectively fixed-in-place. I applied small spots of Bondo a-top the pop rivets and sanded them smooth. Last, I cleaned up the goop along the top edges. The goop label said it was sand-able and paint-able. If by "sand-able" they mean that you can apply sandpaper to it, then, yeah, it's sand-able. It does not powder down, though; it sanded off in big boogers instead. Cleaning the goop took an hour just by itself. Grr.. But, the side skirts are in. With a gloved hand, I wiped primer on the spots I had put Bondo or otherwise sanded down to fiberglass. The next morning, I cuffed the primer down and after one more dance around the car with 320 grit, we're ready to shoot. I did not take a picture of the finished skirting, but the pop-rivet and booger repair is unnoticeable in the final finish. They look completely straight and flat.

Paint Prep 

no boogers, no rivets

Before I could shoot, I had to set up the space and then prepare the panels. For set up, I started by flipping over the hood and rear deck lid. I considered how the paint might flop on the panels, and considered that the hood is effectively flat, relative to the ground, and the rear deck lid is fairly close to flat. The doors, however, hang vertically. I don't have a means of holding a 20# door in the air vertically, but I do have saw horses. I hung the doors on one side of a saw horse, attaching it to the horse with bailing wire. This way, the door is as close to vertical as I can manage, allowing the paint to arrive on the panel in the correct orientation, and for the paint to cure that way as well. I don't know if it matters with this paint, but I figured it didn't hurt to take the extra step.

On shoot day, I have found that I follow a very similar path. If I know that I have touched the car with anything other than a gloved hand, I clean with de-greaser. Either way, I sweep the painting area clean and then vacuum every panel. Last, I pass over every square inch with a tack-cloth to get every speck of dust that might have attached itself to the panels.

arrayed for the shoot

Once the car and panels were wiped down, I set up the paint gun with an inline desiccant from Harbor Freight followed by a pressure controller. I added an air-system quick-release to the inlet side of the desiccant so I could move without the hose attached. With the gun set, and the panels placed, I was ready to mix paint.

By the time I got to this point, we were entering the heat of the day (2:PM), after the end of a heat wave peaking at 39C (102*F). On this day, at this time, it was 27C (80*F) so I set up with medium speed catalyst rather than the fast-dry I used a few days earlier.

 

Main Shooting

When I researched the root causes of dry-spray, I believed the problem was that I was not sending enough material out the gun. In retrospect, I think I was unable to see well enough, and moved too fast, or did not overlap my fan well enough. Regardless, when I set out to shoot this time, I opened up the mixture so more material would pass out of the gun. This, unfortunately, caused orange peel that I was unable to sufficiently account for during the second coat. Unlike the painting session 2 days earlier, this time, I was running the GunBudd, shining light directly on the work. I decided to turn up the pressure and apply a third coat. This time, the orange peel was reduced significantly, but it was not eliminated. Since this is metallic paint (albeit tiny flecks), the recommendation is to not sand, lest the flakes are disturbed. C and Boo said that they really liked the texture, that it looks bold and "badass". I'm not so sure.

unfortunate orange peel

Frustrated at my mishap, I decided to just get after the clear coat anyway. At this point, however, I discovered that I had just used the catalyst designated for the clear coat, consuming almost all of it. I determined that the catalyst I used was fine for paint, but the paint catalyst was NOT fine for clear. So, I could not shoot clear coat until I had more catalyst. Getting catalyst from Eastwood will definitely push me outside the 24 hour re-spray-without-sanding window so I will have to at least sand a little bit for the clear to adhere. Since I have to sand a "key", I think my mistakenly using the clear-coat catalyst creates a new opportunity: I can sand down the remaining orange peel and then shoot another layer of base before switching over to clear coat. The extra coat of base should address any flake flakiness. Of course, I have to wait for FedEx, but I can start sanding while I await the catalyst's arrival. Yeay.

At this point, we have color on every panel. There is orange peel, but I think there is enough paint build to allow me to lightly remove enough of the peel without burning through. Then, I can shoot another coat of base and top it with 3 coats of clear.

Thanks, as always, for following along. I'll post on the finished job once it's done-