Turbo primer questions

R

Revolver

Looking for a new primer and have some questions about the Turbo. I work a day job and do my bodywork and painting at night. I like to spray my primer and let it sit overnight and sand it the next day, usually 24 hours. Thing is, my booth area is very well insulated. If I have the shop doors open, I can get the temp up, but overnight it will go down to whatever the overnight temps are and stay there till I open the doors back up. Will I have shrinkage problems? Should I plan my spraying so that I shoot right when I get home from my day job, so that it will have a couple hours to "kick" before the temps drop? The way my shop is set up, sitting the parts in the sun is not a real viable option.

Sorry for the long first post, but i'm really interested in the SPI products.

Thanks, Gregg
 
As long as you have 60 or above for 3 hours after spraying, you should never have an issue.

One issue you can have is unrelated to shrinkage and that is called mapping, that is where you base and clear and the very edge of the primer shows, this is caused by cold metal temps when you spray the base and can do same day or after primer has sat for three weeks.
 
Thank you for the reply, Barry. Maybe the issue i'm having is actually mapping and not shrinkage. If I may pick your brain (or anyone elses), maybe the problem is me. This time last year I painted my daughter's car. Nothing fancy and being her first car, I used leftover paint from other projects. Stripped to bare metal, body work, epoxy primed, then primer surfacer. Blocked, sealed with reduced epoxy, base and clear. Car looks good, except it has a kind of grainy look to it (if you use light reflection to see it), roof is the worst. Buffing doesn't help. I think I remember reading that you said not enough flash times can lead to this? Products were not SPI, but if i'm the problem I want to resolve it before using your products.

My background is in collision shops, where it's "get em in, get em out" and now that i'm working at home, I need to slow down. The age of the products I used probably didn't help any, either.

One more thing. Would the temperature of the product (before it's sprayed) be a concern? Should I set it in the sun for a minute before I mix?
 
Here is my best guess with what you wrote.

It is a base contracting, most likely culprits are Black, dark Blue, Dark Green and some Reds/Maroons that have a lot of black in them.
If I'm right the problem is in the first coat of base and not enough flash time before second coat.
This problem can show up next day or up to 3-5 days later depending how much clear you have on top of the base.
 
I think you hit the nail on the head. Car is blue and with it happening on the top surfaces I bet I didn't give it enough time between coats. Thank you for your help. I will be calling you soon to place an order.
 
The first coat of base is the most important and when it is a heavy black tinted color, although not always possible in a production shop, if you have time give that coat 15-30 minutes.
 
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