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bob J

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Posted: Tue May 03, 2005 3:03 am

Koa

Joined: Sat Feb 12, 2005 6:20 am
Posts: 1437
First name: Bob
Last Name: Johnson
City: Denver
State: CO.
Zip/Postal Code: 80224
Country: USA
Focus: Build
Status: Amateur

How fine -grits- do you sand tops and b/s before applying epoxy. How fine between coats of finish?
Do I need to use microbeads with System 3 for filling Macassar-if so what proportions?
Thanks

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Mattia Valente

Post subject:

Posted: Tue May 03, 2005 3:13 am

Brazilian Rosewood

Joined: Wed Jan 05, 2005 6:25 pm
Posts: 2749
Location: Netherlands

Straight grained mahogany or EIR, and tops, P220 works fine, although P320 is a bit 'safer', perhaps. P400 is as far as I feel is necessary for a laquer finish guitar. If I'm oiling something, I go all the way to 1500 and steel wool.

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LanceK

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Posted: Tue May 03, 2005 3:13 am

Site Admin

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Status: Semi-pro

I sand to 320

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tl507362

Post subject:

Posted: Tue May 03, 2005 3:28 am

Koa

Joined: Sun Jan 09, 2005 12:12 pm
Posts: 688
Location: United States

220 is fine for epoxy and Laquer. Oil finish is different, you have to go much higher.
Tracy

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Harald Lane

Post subject:

Posted: Tue May 03, 2005 3:33 am

Walnut

Joined: Fri Jan 21, 2005 7:44 pm
Posts: 30
Location: Austria
First name: Harald
Last Name: Lane
City: Vienna
Country: Austria
Focus: Build
Status: Professional

Hi Bob!
Sand to P320, safest way to remove all scratches. I don?t recommend the use of microbeads with epoxy for porefilling, because this are small glassbubbles. I use instead an Thickener called Aerosil. Its easier to squegee it into the pores, the result is much better.

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Michael Dale Payne

Post subject:

Posted: Tue May 03, 2005 7:38 am

Old Growth Brazilian

Joined: Tue Dec 28, 2004 1:56 am
Posts: 10707
Location: United States

Bob, you asked about sanding tops before epoxy filling. I sand tops to P400. You do not need to fill tops such as spruce or cedar. just a seal coat of shellac is all that is needed on spruce and cedar tops.

I don't use microbeads except on very porous woods.

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bob J

Post subject:

Posted: Tue May 03, 2005 8:01 am

Koa

Thank you all. Very helpful.

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