I teach a model rocketry class and am hoping to get the opinion of some of you on an issue we've been having.
We use the same type of acrylic spray paint but sometimes a coat placed atop another (black atop red in this case) doesn't adhere probably and bubbles up, blistering and giving the appearance seen in these linked photos:
I've run some tests in previous years and found that lightly sanding between coats usually helps, but in this case the problem still happened. We are using flat black paint since originally we thought maybe the glossy was the problem.
Any thoughts? In this case it was not the drying time that was an issue since the coat dried overnight before the next coat.
Thanks for any comments.
Greg
Hi res photos available here:
https://picasaweb.google.com/greg33...authkey=Gv1sRgCLOJrZfvlpqhiQE&feat=directlink
We use the same type of acrylic spray paint but sometimes a coat placed atop another (black atop red in this case) doesn't adhere probably and bubbles up, blistering and giving the appearance seen in these linked photos:
I've run some tests in previous years and found that lightly sanding between coats usually helps, but in this case the problem still happened. We are using flat black paint since originally we thought maybe the glossy was the problem.
Any thoughts? In this case it was not the drying time that was an issue since the coat dried overnight before the next coat.
Thanks for any comments.
Greg
Hi res photos available here:
https://picasaweb.google.com/greg33...authkey=Gv1sRgCLOJrZfvlpqhiQE&feat=directlink