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danford1
What did I do wrong?
I paint some pianos and pieces for a local piano shop.
I use SPI black epoxy primer and PPG DCC solid urethane and haven't had this problem before.
I'll list the steps I took then post a picture of the result.
I sanded old paint and Evercoat Gold body filler with 180 grit.
I mixed up black part A and B in equal parts, stirring well.
I then clean off sanded surf with SPI Waterborn Wax and Grease remover. I wiped it dry.
I stirred epoxy again as it sat for about 20 minutes at this time.
I prepped my garage for painting which took about 25 more minutes. I stirred the epoxy again.
I then got busy and didn't get to spray it for about another 1 1/2 hours. The total induction time thus far was
just over 2 hours. I stirred it again before pouring it in my gun and noticed the bottom was thick and gooey but it seemed to stir OK. I think the pot life is supposed to be about 24 hours so I figured is was OK.
I used a Diamond brand tack cloth to remove any dust that may have fallen on surface then sprayed on the epoxy. Right away I saw areas about 3" long and 2" wide where the epoxy was mottled looking.
I'm pretty sure I can sand it flat prior to painting but want to know what I did wrong?
The temp and humidity during the whole time was about 80 and 80. (Michigan summer).
Here is a picture of one of the areas.
Danford1
I paint some pianos and pieces for a local piano shop.
I use SPI black epoxy primer and PPG DCC solid urethane and haven't had this problem before.
I'll list the steps I took then post a picture of the result.
I sanded old paint and Evercoat Gold body filler with 180 grit.
I mixed up black part A and B in equal parts, stirring well.
I then clean off sanded surf with SPI Waterborn Wax and Grease remover. I wiped it dry.
I stirred epoxy again as it sat for about 20 minutes at this time.
I prepped my garage for painting which took about 25 more minutes. I stirred the epoxy again.
I then got busy and didn't get to spray it for about another 1 1/2 hours. The total induction time thus far was
just over 2 hours. I stirred it again before pouring it in my gun and noticed the bottom was thick and gooey but it seemed to stir OK. I think the pot life is supposed to be about 24 hours so I figured is was OK.
I used a Diamond brand tack cloth to remove any dust that may have fallen on surface then sprayed on the epoxy. Right away I saw areas about 3" long and 2" wide where the epoxy was mottled looking.
I'm pretty sure I can sand it flat prior to painting but want to know what I did wrong?
The temp and humidity during the whole time was about 80 and 80. (Michigan summer).
Here is a picture of one of the areas.
Danford1