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Building Tips and technical articles. => Paint and finishing => Topic started by: James Mills on June 08, 2014, 03:04:30 PM

Title: Color sanding dope
Post by: James Mills on June 08, 2014, 03:04:30 PM

Is it okay to color sand dope?  I'm putting down the white on my Junar and it's rough in a few spots and want to smooth things out, also found a few spots that I somehow missed with the primer.

James

Title: Re: Color sanding dope
Post by: Randy Powell on June 08, 2014, 07:13:52 PM

You can color sand dope, but you have to be careful you don't sand through or you will be reshooting the area. sort of depends on how much paint you put down. I've done it in areas that I was going to put decals on or similar.

Title: Re: Color sanding dope
Post by: James Mills on June 08, 2014, 09:29:18 PM

Thanks Randy.  I put on two coats, the first was very lite and went for better coverage on the second.  I had some issues with the spray gun adjusted the fan, I have some spots that look like stripes, so my thinking was to fix the bad spots that I missed with the primer and sand it down even with 800.  My biggest concern is to not let the weight balloon. 

Thanks,

James

Title: Re: Color sanding dope
Post by: Derek Barry on June 09, 2014, 07:22:08 AM

Quote from: James Mills on June 08, 2014, 09:29:18 PM

Thanks Randy.  I put on two coats, the first was very lite and went for better coverage on the second.  I had some issues with the spray gun adjusted the fan, I have some spots that look like stripes, so my thinking was to fix the bad spots that I missed with the primer and sand it down even with 800.  My biggest concern is to not let the weight balloon. 

Thanks,

James

Small repairs should not add much weight. You will be sanding off everything except what is filling the problem areas.

Derek

Title: Re: Color sanding dope
Post by: Randy Powell on June 10, 2014, 02:57:11 PM

Oh, and should say that all of the above is moot if the paint you are sanding is pearl or metallic. You really can't sand that well.

Title: Re: Color sanding dope
Post by: James Mills on June 10, 2014, 11:11:59 PM

Quote from: Randy Powell on June 10, 2014, 02:57:11 PM

Oh, and should say that all of the above is moot if the paint you are sanding is pearl or metallic. You really can't sand that well.

I seem to be having a hard enough time with the basic colors HB~> so I'm not venturing into pearls or metallic's just yet #^.

Thanks,
James

Title: Re: Color sanding dope
Post by: Randy Powell on June 11, 2014, 12:10:50 PM

They can be a pain, certainly.

Title: Re: Color sanding dope
Post by: EddyR on June 14, 2014, 06:34:20 AM

I must admit that some of my best looking planes over the years have been ones that I got a poor finish with the color. I sanded it a lot to get it smooth and they looked bad. I added trim and panel lines to hide the worst spots and shot a very thin clear coat to lock down trim and lines. I was surprised how good it all looked. I sanded it all again and shot more clear. The finish is really in the clear. ~^
EddyR

Title: Re: Color sanding dope
Post by: Bill Little on June 16, 2014, 03:28:17 PM

Hi James,

Is this a "blocking coat" or a finish color?  Did you use a blocking coat?

BIG Bear
RNMM/AMM