More SP Priming
10/21/14 12:14 Filed in: All
Lulled into smugness over how easy the primer worked out on the back side of the seatpan, I filled and sanded the top side and primed it too as well as the panel.
DISASTER. Right when I was thinking this painting stuff wasn't too hard, this thing turned into a runny, saggy, ugly mess.
Yuck! You can see the sags, runs, and droops.
This is the cut panel blank which I primed as well. Those aren't really fisheyes. They are more dimples.
Very rough texture when dry.
Conclusion: Weather, weather, weather. Whereas when I primed the rear of the pan, the day was sunny and dry, the day I did the top side was cloudy and overcast and the humidity was relatively high. It was supposed to rain that afternoon and I wanted to get the primer on before it turned wet. Because of the moisture in the air and the lack of sun I think two things happened. 1) When I did my final wipedown with IPA, it never evaporated all the way. I think that is why the panel has the dimples. There was still residual IPA in the pores of the aluminum. 2) Because of the moisture and lack of sun, the primer did not dry or flash as quickly. The longer to stayed on wet, the more it sagged and ran.
This epoxy primer is tough stuff, so this will be laborious to sand off and start again, but that is the price to pay for getting too cocky about painting. At least it was the only primer. My lesson is learned and I will redouble my attention to conditions.
Lesson learned.
DISASTER. Right when I was thinking this painting stuff wasn't too hard, this thing turned into a runny, saggy, ugly mess.
Yuck! You can see the sags, runs, and droops.
This is the cut panel blank which I primed as well. Those aren't really fisheyes. They are more dimples.
Very rough texture when dry.
Conclusion: Weather, weather, weather. Whereas when I primed the rear of the pan, the day was sunny and dry, the day I did the top side was cloudy and overcast and the humidity was relatively high. It was supposed to rain that afternoon and I wanted to get the primer on before it turned wet. Because of the moisture in the air and the lack of sun I think two things happened. 1) When I did my final wipedown with IPA, it never evaporated all the way. I think that is why the panel has the dimples. There was still residual IPA in the pores of the aluminum. 2) Because of the moisture and lack of sun, the primer did not dry or flash as quickly. The longer to stayed on wet, the more it sagged and ran.
This epoxy primer is tough stuff, so this will be laborious to sand off and start again, but that is the price to pay for getting too cocky about painting. At least it was the only primer. My lesson is learned and I will redouble my attention to conditions.
Lesson learned.