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Author Topic: Fillings for balsa planking  (Read 1802 times)

lakeshore

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Fillings for balsa planking
« on: September 02, 2014, 09:11:55 AM »

Hi
 
just finished balsa planking RS 750 hull, sanded and has quite a few fine gaps and a few depressions. Do i fill these with P38 filler then sand and then glass over or do I resin first then fill with P38 then glass the hull.
any help with this please.
 
John.
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Tug-Kenny

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Re: Fillings for balsa planking
« Reply #1 on: September 02, 2014, 11:21:35 AM »


It's best to fill and smooth before applying resin.  The P38 is porous.


ken

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lakeshore

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Re: Fillings for balsa planking
« Reply #2 on: September 02, 2014, 02:02:33 PM »

Hi Ken
 
thanks for the reply, first time I have ever planked with balsa, so would the P38 be any good as a filler or are there others better suited to the job before glassing.
 
John.
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inertia

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Re: Fillings for balsa planking
« Reply #3 on: September 02, 2014, 02:27:12 PM »

John
You might find that the P38 is harder than the balsa, depending on the grade of balsa you've used. That would leave ridges where the filler is. Have a look at Deluxe Materials' Model Lite or Wonderfill instead. I've not tried the latter but the Model Lite is a permanent stock item in my workshop. http://www.deluxematerials.co.uk/pages/building.htm  Certainly, as Ken says, you should use filler and sand it smooth before glassing.
DM
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lakeshore

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Re: Fillings for balsa planking
« Reply #4 on: September 02, 2014, 02:36:06 PM »

John
You might find that the P38 is harder than the balsa, depending on the grade of balsa you've used. That would leave ridges where the filler is. Have a look at Deluxe Materials' Model Lite or Wonderfill instead. I've not tried the latter but the Model Lite is a permanent stock item in my workshop. http://www.deluxematerials.co.uk/pages/building.htm  Certainly, as Ken says, you should use filler and sand it smooth before glassing.
DM

 
I thank you kindly for that info .
 
John.



When attaching a  'quote'  please ensure your message starts after the  'not quote'  sign, otherwise it becomes part of the quote.

I have done it for you as above.

ken

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Stavros

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Re: Fillings for balsa planking
« Reply #5 on: September 02, 2014, 02:51:11 PM »

Do yourself a massive favour go to halfords and buy some EASY LIGHT filler ....it is so so easy to rub down far eaasier than P38.....obvioulsy apply it after a coat of Resin as balsa is a VERY SOFT wood
 
Dave
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lakeshore

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Re: Fillings for balsa planking
« Reply #6 on: September 02, 2014, 04:37:42 PM »

Hi Dave
thank you kindly for that
 
so thats a coat of resin then Halfords easy light filler then sand and glass.
 
John.
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lakeshore

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Re: Fillings for balsa planking
« Reply #7 on: September 02, 2014, 04:51:52 PM »

Hi Dave
thank you kindly for that
 
so thats a coat of resin then Halfords easy light filler then sand and glass.
 
John.

Dave is it U-pol easy lite Polyester body filler 9.99.
 
John.
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