Basecoat Storage
- Thread starter jcclark
- Start date
Should not change color BUT, what can happen with reducer in it there is more of a chance in storage of kicking pigment out of suspension, so if that should happen it can spray dirty no matter how much you strain it.
If a minor pigment separation, it will spray clean but some colors will be affected and some wont, take a real black black and assume the carbon grind is .05 to 2 micron, if some of these carbons clump to a 8 or say 10 micron by carbon bonding together, paint can spray clean but could turn gray or brown shade, perhaps.
Most colors of the older years, most likely won't have an effect but just depends on formulation, NEVER smart to store long therm with reduced paint poured back in can. OR save the reduced paint in another can and mark it.
If a minor pigment separation, it will spray clean but some colors will be affected and some wont, take a real black black and assume the carbon grind is .05 to 2 micron, if some of these carbons clump to a 8 or say 10 micron by carbon bonding together, paint can spray clean but could turn gray or brown shade, perhaps.
Most colors of the older years, most likely won't have an effect but just depends on formulation, NEVER smart to store long therm with reduced paint poured back in can. OR save the reduced paint in another can and mark it.
'68 Coronet R/T
Oldtimer
Barry,
I only mix what I need and then store base in original can. Is there any known problems doing it this way. I have some SPI Red base coat in an unopened can that I bought back when you stopped making base for a while and had a sale. I am hoping it will be okay.
I only mix what I need and then store base in original can. Is there any known problems doing it this way. I have some SPI Red base coat in an unopened can that I bought back when you stopped making base for a while and had a sale. I am hoping it will be okay.
crashtech
Combo Man & Mod
For anyone coming across this thread, generally speaking it is best to reduce paint on an as-needed basis, which will leave any surplus in un-reduced form. That's what Barry basically said at the end of post #2, just wanted to reinforce the idea for hobbyists.
Also, if the base coat is being activated according to SPI recommendations, that mixture is NEVER to be put back in the can. If you can't use the activated base by the next day, it should probably be disposed of (depending on brand and storage temps).
Also, if the base coat is being activated according to SPI recommendations, that mixture is NEVER to be put back in the can. If you can't use the activated base by the next day, it should probably be disposed of (depending on brand and storage temps).
jcclark
Oldtimer
I have a gold that I used 5 yrs ago on a GM car and stored the left over base reduced, I have that very same car again now
for recent damage and my paint sprays much darker now, I don't know if it's from the base being reduced or if the car has
faded more. So I was just curious. It was PPG base
for recent damage and my paint sprays much darker now, I don't know if it's from the base being reduced or if the car has
faded more. So I was just curious. It was PPG base
Could be either but gold is one that can turn darker the same way I explained what happens to black, except when the metallic bond they get heaver and sink, with same results as if you shot with less reducer or used lower air pressure the color will darken.
Gold will fade also.
Gold will fade also.
Depending on the brand, I know for a fact that Dupont Chromabase now Axalta(same stuff) the Premiere line uses the same tints so as far as I'm concerned the same rule applies. If the color has high solid white (tint #801) that tint will clump and sink to the bottom (reduced or not) over time (exact time unknown dut not too long) and will not be able to be intermixed ever again. I've put it on a shaker for 20min and still clogged the strainer making the color useless.
I also had (years ago) did a over all on a 68 Charger medium gold color (PPG acrylic enamel) and made a mess of the drivers door (dropped the cup) I had enough reduced left over to fix it the next day and when I sanded, masked and shot just the door the next day the color was in no way the same it was 2 shades lighter. The only thing my mom and I could come up with is the reducer changed the color just a smidge and so I bought another qt of the same color and reshot the side and perfect match.
WhatI learned and alwaysi do is store non-reduced paint and if Dupont that contains 801 White time is a factor as to how long before it turns to junk.
I also had (years ago) did a over all on a 68 Charger medium gold color (PPG acrylic enamel) and made a mess of the drivers door (dropped the cup) I had enough reduced left over to fix it the next day and when I sanded, masked and shot just the door the next day the color was in no way the same it was 2 shades lighter. The only thing my mom and I could come up with is the reducer changed the color just a smidge and so I bought another qt of the same color and reshot the side and perfect match.
WhatI learned and alwaysi do is store non-reduced paint and if Dupont that contains 801 White time is a factor as to how long before it turns to junk.