DWilliamA
Materials
- Oct 11, 2010
- 14
304 SS sheets, vinyl covered, #4 brushed, vinyl is stripped parts wiped with MEK type cleaners, run through typical powder coat wash cycle. They come of the wash cycle with streaks and drip marks (scum, light whitish) that bake on if allowed to run through heat dry cycle. Next we want a clear powder coat
Thinking the seal coat stage of the wash cycle is doing this... and wouldn't normally matter except we want clear. Or maybe we have an issue with a glue residue left over from the vinyl that gets smeared around with MEK, or its the MEK residue ?....... If this were simply the seal coat residue - why wouldn't several powder coat companies and representatives from Cardinal not know this?
Thinking of skipping the wash cycle altogether if adhesion test works....
another interesting factoid... we stripped some parts that had been poweder coated and the scum still shows, but it is not streaked it is nice and evenly sheened.. but not perfect, not good enough.
any thoughts?
Thinking the seal coat stage of the wash cycle is doing this... and wouldn't normally matter except we want clear. Or maybe we have an issue with a glue residue left over from the vinyl that gets smeared around with MEK, or its the MEK residue ?....... If this were simply the seal coat residue - why wouldn't several powder coat companies and representatives from Cardinal not know this?
Thinking of skipping the wash cycle altogether if adhesion test works....
another interesting factoid... we stripped some parts that had been poweder coated and the scum still shows, but it is not streaked it is nice and evenly sheened.. but not perfect, not good enough.
any thoughts?