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General control line discussion => Open Forum => Topic started by: Mike Griffin on December 30, 2023, 01:22:15 PM

Title: Never had this happen before.
Post by: Mike Griffin on December 30, 2023, 01:22:15 PM
I also posted this in paint and finishing but wanted to make sure I got the topic covered.

I have been covering with polyspan for years and never had his happen.  I made sure the slick/shiney side was up when I covered the wing.  I filled it with dope and filled it as always.  Did not have any fuzzies at all.  When I have the covering filled adequately with dope, I put it on the paint stand and sprayed on a light coat of Klass Kote white and had fuzzies appearing everywhere.  I think my only solution at this point is when the paint is dry, to wet sand with a fine grit paper.  I have never had to do this so my question is what grit should I use to wet sand, 1000, 1500, 2000??? 

Thanks
Mike
Title: Re: Never had this happen before.
Post by: Ty Marcucci on December 31, 2023, 09:16:31 AM
I's let it dry for five days then start with the 1000 and go from there. Can you say RPITA? LL~ LL~
Title: Re: Never had this happen before.
Post by: Mike Griffin on December 31, 2023, 09:58:40 AM
I's let it dry for five days then start with the 1000 and go from there. Can you say RPITA? LL~ LL~

Yeah Ty it sure is.  Have no idea why this happened but I screwed something up somewhere along the line.  Thank you.

Mike
Title: Re: Never had this happen before.
Post by: Dan Berry on December 31, 2023, 10:35:14 AM
My first thought is that you wiped the plane a rag that left lint on the surface. I don’t think the Polyspan is the problem
Title: Re: Never had this happen before.
Post by: Mike Griffin on December 31, 2023, 11:19:40 AM
My first thought is that you wiped the plane a rag that left lint on the surface. I don’t think the Polyspan is the problem

Dan I guess that is possible.  I used a tack cloth initially, then a damp, not wet, micro fiber cloth after that and then just let it air dry before I applied the paint.  I will try and wet sand it out but I will have to be very careful because every cap strip was affected.
Right now I am just trying to determine the best way to fix it or just let it go and not worry about it.  I think the only option I have at this point would be to wet sand it with fine grade sandpaper, somewhere between 1000 to 2000 grit,  I know one thing, it is going to be a lot of work and for a small profile, I do not know if it will be worth the time and effort.

Mike
Title: Re: Never had this happen before.
Post by: Marty Hammersmith on December 31, 2023, 11:36:38 AM
Being a small profile, if it bothers you so much, maybe just pull it off and try again?
Title: Re: Never had this happen before.
Post by: Ken Culbertson on December 31, 2023, 12:18:43 PM
Funny you should ask.  I had the exact thing happen about 4 years ago in my pre monokote days with a microfiber rag.  They catch on every little thing instead of smoothing them out.  Last time I polyspanned I lightly dry sanded it with 1000 BEFORE the first coat.  Them little whiskers stand up when heated.

Ken
Title: Re: Never had this happen before.
Post by: Dan Berry on December 31, 2023, 02:47:03 PM
Dan I guess that is possible.  I used a tack cloth initially, then a damp, not wet, micro fiber cloth after that and then just let it air dry before I applied the paint.  I will try and wet sand it out but I will have to be very careful because every cap strip was affected.
Right now I am just trying to determine the best way to fix it or just let it go and not worry about it.  I think the only option I have at this point would be to wet sand it with fine grade sandpaper, somewhere between 1000 to 2000 grit,  I know one thing, it is going to be a lot of work and for a small profile, I do not know if it will be worth the time and effort.

Mike
Tack rag is the last step before product.

Title: Re: Never had this happen before.
Post by: Motorman on December 31, 2023, 05:26:05 PM
Probably fly better with fuzzy wings.
Title: Re: Never had this happen before.
Post by: Mike Griffin on January 01, 2024, 02:37:19 PM
I solved the problem.  I wet sanded lightly with 400 grit.  Then went back over it and wet sanded it again with 1500 grit.  Took all the fuzzies away and now I can proceed with the Klass Kote.

Mike