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Cutting scarfs
Brian D wrote:
Here's a free opinion (and I've made a lot of scarfs ...never a failure either); - I prefer cut pores, not pores sanded and smooshed flat. Use of a circular saw attachment (followed by a low-angle block plane finish) or a power hand plane is what I do in my shop. I want the epoxy to suck as deeply in the wood as possible, and judging by how many coats it takes to keep the cut edges looking wet (3 coats, sometimes a 4th), I'd say that the epoxy is going SOMEWHERE where it's doing some good for the strength of the joint. Right into the pores. - I vacuum scarf joints with a ShopVac prior to gluing. Then I wipe down with a damp hand towel and let it dry for 20 minutes. Then I pre-wet with 3 or 4 coats of clear epoxy, then glue it up with a mix appropriate to the task ...straight silica thickener, or silica plus milled glass fiber. Just my 2-bits. When it comes to scarfing, there are a lot of ways to skin the cat. I've heard of others having scarfs pop open when bending wood around a boat, and wonder how many scarfs 'barely held' on others. That's why I'm careful. Brian D That sounds like a very sensible approach to scarfing. |
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