A hybrid method to obtain higher gloss.

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Brian D
Posts: 11
Joined: Sun Nov 30, 2014 9:12 am

A hybrid method to obtain higher gloss.

Post by Brian D » Wed Aug 12, 2015 10:36 pm

For my third guitar, http://www.acousticguitarconstructionfo ... =24&t=2371 I desired a glossier TruOil finish than my first two guitars. More sheen was the aim but not so much that I would berate myself for each inevitable scratch from everyday playing of the guitar. This was my initial untried process, so I’m certain some steps were unnecessary, I just don’t know yet which ones.

For the prep sanding of the body, I sanded up to 320 grit, always using a rigid 8” sanding block or PVC pipe. http://www.woodcraft.com/Product/833902 ... Block.aspx
While sanding the more pliable top I tried to keep the ends of the sanding block over the braces and the outside edge to avoid introducing any depressions or ripples.

Then sealed with Zinnser Sealcoat.

Pore sealed B/S with Pore-O-Pac until most pores were filled, to leave a little character of the wood.

Began TO applications using method as in Dave Bagwell’s video http://www.acousticguitarconstructionfo ... ?f=28&t=88
Wanting to build up the thickness of finish, I used only very light pressure with the paper towel covered foam, to remove excess TO. After 2-3 hrs, I lightly scuffed surface with gray synthetic pad and repeated. After 10-12 coats it began to look thick enough to level.

From here on out sanding was wet-sanding with soapy water stewmac.com/How-To/Online_Resources/Finishing/How-To/Online_Resources/Finishing/Wet-sand_before_buffing

I then leveled lightly, being nervous about sanding though the finish, using 600 grit paper on block. Then 1200, 2000 grit. Concerned about final thickness I decided even more TO would result in better protection and also give me a chance to improve on my first attempt at leveling. Repeating with 8 more coats I was ready to level and sand out again.

I then waited 6-7 days for finish to harden.
Using Micro-Mesh Soft Touch pads 3600-12000 brought sheen out nicely.

Buffing was the final step. I read where others had used Mequiar’s #7 Mirror Glaze or 3M Finesse-It II auto polish to polish guitars. I found the 3M at a local NAPA store. The final sheen emerged using a drill, an inexpensive cotton buff pad from HF, some elbow grease and the automobile polish.

Final thoughts: This hybrid process worked out well for me because:
- I don’t have the luxury of spray equipment or an area set up for spraying guitars.
- I can literally just set the body aside while waiting for each coat to dry and work on the neck.

Edit: However, in hindsight, I don't think I would repeat this whole process. I will either try another regular TO application and then finally finish with the higher grit micro-mesh and polish -or- try a brush-on varnish and research established sand and polish schedules.
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Last edited by Brian D on Thu Aug 13, 2015 11:45 am, edited 1 time in total.

Dave Bagwill
Posts: 5951
Joined: Tue Dec 13, 2011 7:44 pm

Re: A hybrid method to obtain higher gloss.

Post by Dave Bagwill » Wed Aug 12, 2015 10:48 pm

Thanks Brian, interesting method and really nice results!
-Under permanent construction

John Link
Posts: 800
Joined: Tue Nov 27, 2012 8:01 pm
Location: Kalamazoo, MI

Re: A hybrid method to obtain higher gloss.

Post by John Link » Wed Aug 12, 2015 11:56 pm

That is a remarkably glossy look, especially for True Oil. Thanks for the details.
John

John Parchem
Posts: 2746
Joined: Fri Dec 23, 2011 8:33 pm
Location: Seattle
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Re: A hybrid method to obtain higher gloss.

Post by John Parchem » Thu Aug 13, 2015 9:38 am

Good looking finish!

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