DIY Forearm contour/tummy cut/contoured heel on parts Tele

I’m sure this was answered already, but if I’m using a power sander for a rough cut, coarser is better. What grit should I be starting with?
 
You can start as rough as 40 then 80 and 120 will take out the deep scratches without much effort. Then fine sand to ur preference.
 
If the contours are what I envision, you might loose your mind going at it all with an orbital sander. A good heavy rasp or a hammer and sharp chisel will get the bulk gone quicker. Then file and hand sand to final shape and finish.
 
Yeah, I wouldn't try doing the whole lot with a sander. I've only had to add a forearm contour twice and a gut contour once, so I'm hardly a definitive authority on the subject, but in all three cases I got most of the bulk out with a simple wood saw, then a big rounded rasp to blend in the edges, and finally an orbital sander with medium grit to do the fine shaping; I always do fine grit sanding by hand.
A forearm contour usually drops to around half the thickness of the body blank – that's a lot of wood to get through with a sander, even with very rough grit. Plus it's a lot cleaner if you can get most of the wood out in one lump rather than having dust and splinters flying everywhere. Draw your contours onto the body, saw or rasp off (I can't vouch for a chisel; it could work but I usually use softer woods that get damaged too easily by chisels and avoid them) the majority of it just a couple of millimetres above your contour lines, then break out the sander to get right down to the lines.
 
I've refinished one guitar and sanded everything with 400 grit. I see the wisdom in using progressively smaller grit, but I got it pretty dang smooth with 400. Do however much you wish!

Also +1 on finishing it with something. Oil, wax, paste, poly, lacquer, anything. Waxes and pastes have to be reapplied. I've had success with danish oil, tung oil, and various polyurethanes. One or two coats has been fine for my project.
 
I used a Black & Decker 20v lithium orbital sander. Started with 40 grit and progressed thru to 120. Final sanding I went to 800. Although I worked all the way to 10000 on my rosewood Tele neck...

I go for the "sexy spine" for the strat and just a bit of arm relief for the Tele.
 

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Yamaha Pacifica Tele's have tummy cuts. You can find them on Craigslist for $150.
 
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