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Cherub Chat => Tech Chat => Topic started by: ghislain_devouthon on January 14, 2008, 02:41:14 PM

Title: Sanding and fairing technics
Post by: ghislain_devouthon on January 14, 2008, 02:41:14 PM

Hi,

I'm currently fairing and sanding NBS hull. Has it is a difficult exercice, it worth sharing together your best practice.

Rather than using a machine I'm sanding with a sanding block on which I fix the paper with double face tape. I use many flexible boards of 80 cm, 40 cm and 20 cm long and 10 cm wide. For some specific parts I use some foam as a sanding block for its flexibility.

I began with a 80 paper then 120 and 180.

To be able to watch what I'm doing and to enlights bumps, I sometime add some coloring substance in the coat.

I use Sicomin MixFill 20 coat which is about great. I'm looking for something to have a smooth finish before primer and painting as the my coat is a bit porous.

Then it's just about time.

What are your tricks for that kind of job ?

Title: Re: Sanding and fairing technics
Post by: Tom K on January 14, 2008, 04:41:56 PM

When sanding with long boards I much prefer a shorter (about 450mm - 500mm) rigid board. Other than that, I totally agree with your methods. And your certainly correct in saying 'it's all about time'   

Title: Re: Sanding and fairing technics
Post by: Phil Alderson on January 14, 2008, 06:20:54 PM

I sometimes use spray adhesave for the long board

I like the idea of using pigment, what do you use?


After the paint when you flat with wet and dry I like to use a small bottle of water with a spray trigger to keep the surface wet.

Title: Re: Sanding and fairing technics
Post by: ghislain_devouthon on January 14, 2008, 09:38:58 PM

I haven't found on B&Q website but have a look at Castorama pigment section (http://www.castorama.fr/store/CatalogueIndirecte/peinture-et-produits-bois-peinture-interieure-lisse-colorant-et-pigment/p-categorie_4946-casto_product-PRDm711521.htm).

It's a universal pigment. It works really well.

Title: Re: Sanding and fairing technics
Post by: admin on January 14, 2008, 10:00:07 PM

Looks like interesting stuff

Title: Re: Sanding and fairing technics
Post by: ross_burkin on March 26, 2008, 09:20:56 AM

Is a long board just a bit of wood which you stick long strips of sandpaper to?

Title: Re: Sanding and fairing technics
Post by: Tim Noyce on March 26, 2008, 10:52:33 AM

yep!

stops you working on one patch too much and making some bits deeper than others. i was chatting to a very experienced dude a while ago and he is very disciplined when he fairs. Counts each stroke and moves about the hull methodically to improve the finish. Once you've got the paint off, get them microballoons out and get sticky... also get yourself a good dust mask or you'll be adding some interesting extras to your lungs!

Title: Re: Sanding and fairing technics
Post by: ross_burkin on July 16, 2008, 08:49:26 PM

Tim had a look down my dagger board at Dave's in March and sugested I should re-fair it. Help?