Help.... K36 surfacer question
Thread Starter
Intermediate
Joined: Jul 2001
Posts: 39
Likes: 0
From: Mesquite TX
Help.... K36 surfacer question
Ok. I'm going by the Lar's reciepe for painting, 1st time painting any car for me. I notice the DP goes on leaving a nice smooth finish however the K36 leaves a somewhat rough finish. Even when sanded down with 150 it's not a smooth as the DP was. Is that the way its supposed to be ??? :confused:
Burning Brakes
Joined: Sep 2000
Posts: 922
Likes: 0
From: Maine
Re: Help.... K36 surfacer question (redvettefreek)
I think so. Remember that you'll end up wet-sanding with 600 grit before spraying, and that'll make it as smooth as a babies behind...
Why don't you try block sanding with some 320, then wet sand a bit and see if it improves? I painted mine recently using the same recipe and it was OK.
Why don't you try block sanding with some 320, then wet sand a bit and see if it improves? I painted mine recently using the same recipe and it was OK.
Safety Car
Joined: Jan 2001
Posts: 4,660
Likes: 3
From: South Central Louisiana
St. Jude Contributor
Re: Help.... K36 surfacer question (Frank75)
:iagree:
And you may have sprayed it on a little dry. I noticed it do the same thing when I used it, but it sanded down nicely. Anything sanded with 150 won't be super smooth, but the final 600 grit pass will change that. The base coat won't want it any smoother.
And you may have sprayed it on a little dry. I noticed it do the same thing when I used it, but it sanded down nicely. Anything sanded with 150 won't be super smooth, but the final 600 grit pass will change that. The base coat won't want it any smoother.
Racer
Joined: May 2002
Posts: 325
Likes: 0
From: Feenix Az
Re: Help.... K36 surfacer question (Frank75)
I think so. Remember that you'll end up wet-sanding with 600 grit before spraying, and that'll make it as smooth as a babies behind...
Why don't you try block sanding with some 320, then wet sand a bit and see if it improves? I painted mine recently using the same recipe and it was OK.
Why don't you try block sanding with some 320, then wet sand a bit and see if it improves? I painted mine recently using the same recipe and it was OK.
Dane
Instructor
Joined: Dec 1999
Posts: 195
Likes: 1
From: Van Buren AR
Re: Help.... K36 surfacer question (redvettefreek)
DP is a sealer and goes on very smooth. K36 is a primer surfacer it goes on fairly rough unless you reduce it more than the directions call for. It will get smoother as you sand it with finer sandpaper.
Le Mans Master
Joined: Aug 2001
Posts: 7,804
Likes: 4
From: Standing still with all my might Texas
Cruise-In X Veteran
St. Jude Donor '09-'11
Re: Help.... K36 surfacer question (Arkansas Flash)
While I haven't painted a car in many years I do use K-36 on all of my model jets which are mostly all fiberglass just like a corvette, only they are much harder to prep and paint than a car. :yesnod:
Everytime I buy K-36 they tell me that it does not need to be reduced at all, but every time I have tried to shoot it through any of my paint guns without reducer it shoots very dry and "spattery".
If you shoot it on too dry you will have major adhesion problems later on, and the paint will start coming off in big sheets.
I have found the best results from K-36 when it is reduced at least 75-100%.
It would be interesting to hear how much reducer the professional painters are using with this stuff.
[Modified by Kevin_73, 11:34 AM 9/29/2003]
Everytime I buy K-36 they tell me that it does not need to be reduced at all, but every time I have tried to shoot it through any of my paint guns without reducer it shoots very dry and "spattery".
If you shoot it on too dry you will have major adhesion problems later on, and the paint will start coming off in big sheets.
I have found the best results from K-36 when it is reduced at least 75-100%.
It would be interesting to hear how much reducer the professional painters are using with this stuff.
[Modified by Kevin_73, 11:34 AM 9/29/2003]
Thread Starter
Intermediate
Joined: Jul 2001
Posts: 39
Likes: 0
From: Mesquite TX
Re: Help.... K36 surfacer question (redvettefreek)
Thanks everyone for your input. I shot another coat of k36 yesterday. I'm going to block it with 220 tonight. I'm finding that it will sand very easy, almost to the point that if your not carefull you can sand it all off, especally with 180. If anyone has any suggestions on shooting Mettalic I would appreciate them as well. I've been told that if its your first time painting a car to stay away from metallic.
Racer
Joined: May 2002
Posts: 325
Likes: 0
From: Feenix Az
Re: Help.... K36 surfacer question (redvettefreek)
I've been told that if its your first time painting a car to stay away from metallic.
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Melting Slicks
Joined: Dec 2000
Posts: 2,198
Likes: 2
From: Eastern Connecticut
Re: Help.... K36 surfacer question (Enad)
If you don't mind me asking, why are you using such coarse paper? 220 is about as rough as you need for blocking primer, then 320/400/600. Are you using a guide coat to find low and high spots? I found that using an 8" sanding block gave me much better results than an 6" block. Long board the straight areas. Joe
