DrivenImageAuto
New Member
Hello, so here is the run down of the problem I'm having:
Started using SPI 2k primer a short time ago, looking for a more cost effective alternative to the PPG primers I was using
Car that was worked on had a previous paint job, however the (replacement) hood on it was OEM paint, car was blocked completely and finished in 320 before primer
In some areas where high spots, the blocking naturally cut through the clear and base coat on both the body and the hood, you could see the previous layers, did some minor fills with USC icing ect
On to priming: 4:1:10% Mix sprayed through a 1.6 with 5min flash in between , temps were over 80 degrees at the time Florida, total of 3 medium coats
Parts sat out in the Florida sun for a little over a month, back inside, blocked flat, finished in 320 added another two light coats of SPI 2k Primer about another 3 weeks of dry time in the sun (project car of mine had no rush)
final block sanding 320 then 400 then 600 parts were smoooth AF
Sprayed 3 coats of PPG base reduced 1:1 about 15mins in between coats, used my sun gun at an angle and started to notice repair mapping / sand scratch swelling
I decided to 800 grit the base coat in SOME of the swelled areas but not all, clear coated two hrs later
The you could immediately start to see the mapping start to show, and proceeded to get worse over the span of two weeks as the clear coat cured in the sun, Euro2020 sprayed 4:1:2
The areas where I had leveled out the mapping on the basecoat with 800 did not swell through as much after clear coat
The only thing I can think of is that the solvents are being absorbed by the 2k primer and the layers below it are reacting to the solvents causing the mapping, other than that I cant think of anything else, the only other time I ever had this problem whas when a Medallion rep came by and we tried their primers and it has terrible, it swelled up the repairs right away and the mapping was horrible.
Any imput would be greatly appreciated thanks in advance !
(FWIW: I also got heavy mapping on the hood and that had OEM finish)
Started using SPI 2k primer a short time ago, looking for a more cost effective alternative to the PPG primers I was using
Car that was worked on had a previous paint job, however the (replacement) hood on it was OEM paint, car was blocked completely and finished in 320 before primer
In some areas where high spots, the blocking naturally cut through the clear and base coat on both the body and the hood, you could see the previous layers, did some minor fills with USC icing ect
On to priming: 4:1:10% Mix sprayed through a 1.6 with 5min flash in between , temps were over 80 degrees at the time Florida, total of 3 medium coats
Parts sat out in the Florida sun for a little over a month, back inside, blocked flat, finished in 320 added another two light coats of SPI 2k Primer about another 3 weeks of dry time in the sun (project car of mine had no rush)
final block sanding 320 then 400 then 600 parts were smoooth AF
Sprayed 3 coats of PPG base reduced 1:1 about 15mins in between coats, used my sun gun at an angle and started to notice repair mapping / sand scratch swelling
I decided to 800 grit the base coat in SOME of the swelled areas but not all, clear coated two hrs later
The you could immediately start to see the mapping start to show, and proceeded to get worse over the span of two weeks as the clear coat cured in the sun, Euro2020 sprayed 4:1:2
The areas where I had leveled out the mapping on the basecoat with 800 did not swell through as much after clear coat
The only thing I can think of is that the solvents are being absorbed by the 2k primer and the layers below it are reacting to the solvents causing the mapping, other than that I cant think of anything else, the only other time I ever had this problem whas when a Medallion rep came by and we tried their primers and it has terrible, it swelled up the repairs right away and the mapping was horrible.
Any imput would be greatly appreciated thanks in advance !
(FWIW: I also got heavy mapping on the hood and that had OEM finish)
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