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-   -   Time frame to clear coat (http://www.hotrodders.com/forum/time-frame-clear-coat-70756.html)

MrMopar 09-23-2005 05:06 PM

Time frame to clear coat
 
I'm in the middle of painting my 67 Barracuda with Dupont Nason Base/Clear
Recently someone mentioned I should have shot the clear soon after the base? How important is this? I shot the last part of the base several days ago?

beemdubya 09-23-2005 05:16 PM

Hm.. im pretty sure nason has a 12 to 24 hour window.. if you clear the car right now the clear isnt going to adhere. just scuff the base then shoot on more coat of base then clear it about 45 minutes later and it will be fine.. i wait no more then 12 hours to clear..

Centerline 09-23-2005 06:16 PM

Go here and read the "P" Sheet for the paint you're using. (Click on products, then Nason and you will see the product data sheets for all Nason products.) It will tell you how long you have to shoot the clear. It will also give you mixing instructions, spray pressures, drying time etc, etc.

MrMopar 09-23-2005 06:55 PM

I have already got the sheet on the paint, one of the first things I did when this came up. All it says is... "Allow base coat to setup for 15 minutes prior to clear coating. Longer dry time may be required depending on shop conditions and the number of coats applied." No where does it say "...but no longer than..." or something to that effect.

I do have some base left if needed but it'll be very close on even getting a lite once over.

Thanks

Alan

Bee4Me 09-23-2005 08:31 PM

Any base paint has a "window" to recoat over and it's usually 24 hrs.
After that,it's BEST to resand and lay another coat.
Nason is a sloooooooooow drying base and an hour or two is best before clear after the last coat (hour between coat's for that matter).
You did not read this here or from me but, You can use some DuPont Adhesion promoter and shoot the clear after it flash's properly if you don't want to resand or have enough base left. I have done this several times and DON'T recomend this if it's a first rate car,but, in a "driver" situation, have done this with good results.

Centerline 09-23-2005 09:17 PM

Quote:

Originally Posted by MrMopar
I have already got the sheet on the paint, one of the first things I did when this came up. All it says is... "Allow base coat to setup for 15 minutes prior to clear coating. Longer dry time may be required depending on shop conditions and the number of coats applied." No where does it say "...but no longer than..." or something to that effect.

I do have some base left if needed but it'll be very close on even getting a lite once over.

Thanks

Alan

You're right. Those "P" sheets leave a lot to be desired. Given the lack of info a good rule of thumb is to clear base within 24 hours but if possible I'd check with your supplier to make sure.


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