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rattle can paint has solvents basically thinners.
you lay a coat of paint its basically pigment and thinners.
follow me now.
You lay one thick coat thats a lot of thinners in there.. the pigments etc want to dry but theres sooo much solvents/thinners etc they're beating up the pigments that just want to dry..
3 coats.
1. just a dusting let that flash/dry (read the can it should tell you how long between coats etc)
2. 2nd coat now a bit more coverage. This coat interacts with the first coast which was just a light dusting because YES the paint has thinners/solvents in it etc... so it basically MELTS with the first coat, think of chocolate ice cream onto of vanilla you walk away for 2 hours what happens?
3. 3 coat should just be medium spray etc. again this is going to be a kick in the pants to the two coats under this one.
*** give it time to dry ***
Another thing to think about is that you may be contaminating between sandings. These are'nt cars up for a detroit auto show they dont need to be sanded between every coat, you may be introducing contaminents between coats, messing with those solvents/thinners and the pigments/paints etc.
If you're sanding between coats its because you're not getting a smooth finish. Back your can up to the recommended distance (its on the back of the can)
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