To Seal or not to seal

J

JC Daniel

Promoted Users
I just replaced rockers and cab corners on my friends 2006 GMC 2500, U8564 paint code which is summit white. I sealed my work on the cab with white epoxy reduced and the white looks quite a bit brighter than what is original. My question is this, I am getting ready to do the bed wheel arch panels and was wandering if I should use white reduced epoxy to seal my work? I am asking because I suspect the white sealer makes the panels stand out more? I think factory white was sprayed over grey sealer or primer is why I am confused on this, I appreciate you guys taking time to help me out.
 
Have you already sprayed the 8564 over the reduced epoxy? If so might be the 8564 didn't have enough coverage. Or the old paint has just faded.
 
How many coats of base did you apply?
Different base coats may require more coats to achieve what is called "true color" which basically means the undercoat is not affecting the finished color.
This is why spray out cards are used. Basically black and white squares that you shoot coats of base over until you see no difference.
 
The undercoat color should have no effect on the final appearance if full coverage is achieved. A test sprayout should be done of the color as '68 says. I use white primer all the time under 8624, it minimizes the amount of basecoat needed.
 
The correct code is 8624, I did buff everything Saturday and it looks a lot better but the rockers are a brighter white "to me anyway."
The owner says he can't tell any difference in the panels. I sprayed two coats of reduced white epoxy and two coats of base.
 
I have a "white" Saab that i did some rocker cover and bumper paint work on...Actually, i paid a shop to do the first paint job on the pieces...The pieces were direct swap upgrades.This is /was a reputable shop..The "white" match was not even close..He had 2 variants of the color and apparently did not want to work harder than that on color matching..I literally sanded all his new work and had some chromabase matched with a scanner and re did the 4 pieces..The color was s till not perfect, but much better..It bothers me, but most folks dont notice...Point, I feel white is super tough to match, other folks beg to differ..No blending was involved
 
I usually spray at least 3 coats of base and that's using Motobase LV which covers fantastic. Yes it looks good with just two coats but having been the victim of not achieving full coverage before, I would rather spray an extra coat than have to prep and respray panels.
Also, I have noticed that lighter colors usually require more coats to reach full coverage.
 
8624 is still being used since 1988. I have a book full of 8624 spray outs over the last 36 years. I remember getting a run of the early 90's that looked "pink" compared to the variants. Had to add some magenta to make a new alternate. White is difficult to match, a couple drops of toner can change the color dramatically.
 
Chris_Hamilton said:
There are like 10 or more variants of 8624. I'd say the color difference you are noticing JC is from it being a variant from the prine formula which is what they most likely mixed for you.
Click to expand...
The 8624 was gave to me by a local jobber who is trying to get his business started, it is called matrix edge base coat. It covers well but I don't like the brightness of it, I sprayed the same color back in the winter using shop line plus and it was a good match. Maybe I should get the shop line plus to spray the bed because that is a lot of area up against the old cab.
 
JC Daniel said:
The 8624 was gave to me by a local jobber who is trying to get his business started, it is called matrix edge base coat. It covers well but I don't like the brightness of it, I sprayed the same color back in the winter using shop line plus and it was a good match. Maybe I should get the shop line plus to spray the bed because that is a lot of area up against the old cab.
Click to expand...
There are at least 10 different variations of the formula. Maybe more, I can't recall at the moment. They go every which way, bluer, pinker, etc. Probably one of the colors with the most variants out there. Chances are your vehicle is not the "prime" color and one of the variant formulas.

To have a better chance at matching/blending it you need to compare the color on the vehicle you are working on with the variant chip deck at the Paint jobber. Choose the one that most closely matches it. Everything else is just guessing and hoping.
 
Chris_Hamilton said:
There are at least 10 different variations of the formula. Maybe more, I can't recall at the moment. They go every which way, bluer, pinker, etc. Probably one of the colors with the most variants out there. Chances are your vehicle is not the "prime" color and one of the variant formulas.

To have a better chance at matching/blending it you need to compare the color on the vehicle you are working on with the variant chip deck at the Paint jobber. Choose the one that most closely matches it. Everything else is just guessing and hoping.
Click to expand...
I appreciate your advice, I will go to the jobber and check the variant chip deck.
 
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