Although, at times, it feels more like one step forward and two steps back.
I think I didn't ask the right questions at the right time, or just didn't absorb the answers when I did ask. I've made a number of mistakes that I wouldn't make again. First was using oak plywood for my sides because it was on clearance sale and cheap. It's also an open grained ply and I've had to do a lot of work trying to fill the grain, and it's still not smooth in places. Now that I have a coat of primer on, the open grained places show up really well.
Next, both the Zinsser primer and finish coat paint are latex based. That was another mistake so far. Maybe it's the type of primer, or maybe it's because it's latex based, but when I rolled some on, I could see that the roller marks would show when it dried, and they did. I sprayed the rest of the trailer with better results, but even then, it doesn't spray as smooth as oil based paint. This primer doesn't spray as well as the latex enamel I used to spray on my craft items.
And, latex paint, when sprayed (even thinned with water), has a tendency to dry and clot on the nozzle and spit out bits of dry paint occasionally if you don't keep the nozzle wiped clean every few minutes. And then, I had some dribbles. This results in having to sand out the "bumps". And this primer may need several days to cure enough to sand without rubbing up bits of primer.
So, now, I am about ready to return the finish paint buy a gallon each of oil-based primer and floor and porch enamel and start over. That's AFTER I spread on more of the water putty and resand to try to get all of the grain in the ply filled.
Due to the size of my TTT, If I had used aluminum or FRP skins, I'd have had several seams on the sides and top to cover with molding. That, and the extra expense, are two of the reasons I decided to paint it. My lack of experience with either covering was another reason. But, the extra work involved due to my errors had really been testing my endurance. This morning, I asked my wife if she got the tag number of the truck that must have run over me last night.
I'm about ready to just let it go for a while. Maybe I'll just work on the fenders and the wiring the inside. I don't come across as being about disgusted with the whole darned project, do I? Oh well, in another day or two, I'm sure I'll be OK and back working on the exterior.