In about the last week three different people sent me a post on another forum
About I under activated my clear and spray 4:1 instead of 2:1, all pointed out he was getting a bunch of white-wash answers and said I should get on and answer.
NO, don’t really care about that forum BUT I get this call very often and the question what do I do?
Without writing a book, I want people on my forum to understand what happens here.
SO short and sweet.
Depends on the quality of paint you are using but the majors with their good lines usually have the OH/NCO set up 1:1/110 to 1.15 meaning going by resin you are adding about 10 to 15% more ISO than needed as we know you cannot mix them all in to mate with a paint stick, all of SPI’s are in the 1:1:5 to 1.18 area.
Private label and lower grades is usually 1:.00 to .80 or .85 to save money and in this case used 29% solids clear.
So, what will happen in this guy’s case?
He has cut the life by half, so from 3 year to maybe a year or two-year life span.
He has hurt the UV protection because of the cut back in the activator, yes, we put UV in the clear but the aliphatic ISO'S also help with the UV’s.
Bird crap if not washed off soon can eat the clear as with industrial fallout or a simple soda spilling.
What would be the easiest way to save this without stripping? He could set in full sun for a week, wet sand and spray 2 to 4 coats of clear over it mixed the right way, the risk here is to soon and the second coat application of clear could bust off the first after driving time.
I could go on and on but this give you a general idea of why the OH/NCO is so important and you never want to sub activators.
About I under activated my clear and spray 4:1 instead of 2:1, all pointed out he was getting a bunch of white-wash answers and said I should get on and answer.
NO, don’t really care about that forum BUT I get this call very often and the question what do I do?
Without writing a book, I want people on my forum to understand what happens here.
SO short and sweet.
Depends on the quality of paint you are using but the majors with their good lines usually have the OH/NCO set up 1:1/110 to 1.15 meaning going by resin you are adding about 10 to 15% more ISO than needed as we know you cannot mix them all in to mate with a paint stick, all of SPI’s are in the 1:1:5 to 1.18 area.
Private label and lower grades is usually 1:.00 to .80 or .85 to save money and in this case used 29% solids clear.
So, what will happen in this guy’s case?
He has cut the life by half, so from 3 year to maybe a year or two-year life span.
He has hurt the UV protection because of the cut back in the activator, yes, we put UV in the clear but the aliphatic ISO'S also help with the UV’s.
Bird crap if not washed off soon can eat the clear as with industrial fallout or a simple soda spilling.
What would be the easiest way to save this without stripping? He could set in full sun for a week, wet sand and spray 2 to 4 coats of clear over it mixed the right way, the risk here is to soon and the second coat application of clear could bust off the first after driving time.
I could go on and on but this give you a general idea of why the OH/NCO is so important and you never want to sub activators.
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