Acacia dread build thread

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56nortondomy
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Re: Acacia dread build thread

Post by 56nortondomy » Fri Dec 14, 2018 10:41 pm

The epoxy has really made the b/wood pop Allan, should look awesome under the finish. Wayne

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demonx
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Re: Acacia dread build thread

Post by demonx » Sat Dec 15, 2018 12:40 pm

This morning is a day off, so I spent a bit of time 320 sanding the entire guitar, running the 320 around all the shard edges to create a minor fillet and just paying attention to anything I may have missed.

Problem areas I place a bit of tape to find them easily (less sanding work later involved than if I used pencil) and then I come back and do some touch up fill or whatever is needed.

In today’s case, there was a spot on the rear binding which needed a tiny bit of fill, as seen in this pic.

There was a pinhole in the Gidgee headstock cap which I filled and a couple of spots around the edge binding. Once these are dry and sanded, the guitar is then ready (I hope, unless I missed something) for spraying the sealer.
AC08E0FB-CFD7-49E7-81CB-BA6E9AAEEB05.jpeg

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demonx
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Re: Acacia dread build thread

Post by demonx » Wed Dec 19, 2018 12:47 pm

Spraying!

In the time I’ve been on this forum I see a lot of newcomers as well as those with a few builds under their belt asking about spraying, so I’ll break down the process with some hints and tips to help you experiment and learn your own way.


- I use Nitrile gloves. Latex gloves will just melt off your hand if using 2k. Make sure to at the absolute minimum wear a canister mask which you cannot smell anything through. If you rarely use it then it’s probably best to use a fresh canister each time. These should be kept inside an airtight container when it in use so air doesn’t flow through the canister.

- airhose away all dust a considerable amount of time before you spray, so that it has time to settle. A lot of dust comes from the floor, so be aware of this. Before your guitar is in there too!

- one tip from booth painters is to spray the booth with insect spray as to eliminate and flying pests which may want to land in your wet paint. Again, allow time for that to settle as well and do it before you hang your guitar.

- Make sure to always empty the air/oil traps on your compressor and to make sure you dump the water out of the tank.

- mix your clear coat and set it aside to start its process, then prepare your gun. I like a 1.8mm tip when spraying clear coat. I use the same tip for clear sealer and any solid primers. I use 1.4mm tip if I’m spraying base coats, but for this guitar the only tip used will be 1.8mm.

- set the air pressure AT THE GUN! I like no less than 40ish when spraying clear. Too many beginners use the gauge on their compressor. This is not going to give you an”at the gun” pressure. Too many beginners are scared of the air pressure and wind their guns screws in too far. I’ve never had mine in further than half way, even that is too much.

- It’s called spray painting, not splash painting, if you don’t have enough air pressure the paint will “fall” out of the gun into the guitar and not spray onto the guitar and atomise etc as the products are designed. So have that air pressure at the gun, if you don’t have a gauge on your gun, buy one! Also make sure you aren’t holding the gun too far away as this will cause another issue of the paint drying too much before it gets to flow on the surface. 10-15 cm is a rough comfort zone. Much further away than this is too far and the paint can’t work As it’s designed.

- The first coat you spray you will move a bit quicker so that you’re not laying on too much, you’re not looking for total coverage on the first coat, you’re looking for a base to work from. This is called tack coat. By get a quick, thin tack coat on you lessen your chances of creating a run as it’ll help the following coats adhere and stay.

- Crossover between coats is a personal choice, I’m a lazy sprayer and tend to do about 50%, somesprayeds will feel safer and more comfortable around 10%. The more crossover the more chance of a run, but you’ll get better product flow as well with a bit more crossover. So choose according to your skill level and comfort zone.

- Flash time (time between coats) is a variable according to environmental spray condistions, so let’s assume you’re spraying in a garage and not a professional booth, like I am spraying in a garage in these pics, I like to leave 10-15min after the tack coat. Then I’ll spray the second coat, wait around 20-30 min, then around 30 minutes before I spray the third, if I’m spraying a fourth I’ll leave it 30-45 minutes.

The reason for this is, if you spray too close together and not allow it to flash off, then you will trap gasses inside the finish, you’ll get solvent pops, fish eyes, more chance of runs and hangers. So it’s better to leave it that little bit longer when you’re not inside a booth.

- One tip that isn’t always done, when you’ve finished your spray session, let it tack off again for an extra extended time and then peel back the fingerboard tape. I don’t always do this, but sometimes paint can chip at the edge around this area and if you peel it back while the tape is just tacky, then you eliminate the chipping issue.
22609511-6DE6-42FC-A473-E0A2792F7443.jpeg

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demonx
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Re: Acacia dread build thread

Post by demonx » Wed Dec 19, 2018 1:23 pm

I’m hoping this links works, it’s an example of my lazy spraying, but it gets the job done.

https://www.instagram.com/p/BrjMkPQHRvv ... c3ytm987uy

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Re: Acacia dread build thread

Post by Mat » Thu Dec 20, 2018 12:23 am

Great explanation on the spraying, its an area I struggle with and my old man is a qualified french polisher and furniture sprayer pushing 67 years of age. Maybe I should just ask for a lesson.

and that timber looks great!

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Re: Acacia dread build thread

Post by kiwigeo » Thu Dec 20, 2018 12:08 pm

What's that gun youre using?
Martin

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demonx
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Re: Acacia dread build thread

Post by demonx » Thu Dec 20, 2018 2:18 pm

kiwigeo wrote:
Thu Dec 20, 2018 12:08 pm
What's that gun youre using?
It’s actually the cheapest piece of crap gun that I’ve got!
A $100 workquip !!!

It’s my primer gun, but since ive broken all the cups for my other guns and not putting money back into the business I’ve just been using this for everything lately.

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demonx
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Re: Acacia dread build thread

Post by demonx » Sat Jan 19, 2019 2:27 pm

This one has been put aside for quite a while, however with today being the perfect temperature for spraying I thought I’d take the chance to lay down some more sealer coats.

It had three coats last time and then I’d sanding it back to the timber, not planned that way, it’s just that I got some rub throughs and decided to do a full sand back. Today I’ve sprayed four more coats.
099053A3-D2A5-4EAA-8420-8A3EB67D1871.jpeg

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WJ Guitars
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Re: Acacia dread build thread

Post by WJ Guitars » Sat Jan 19, 2019 4:36 pm

The timber grain is looking great. How many more coats will be applied for the final finish?

Wayne
https://wjguitars.wixsite.com/mysite-1

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demonx
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Re: Acacia dread build thread

Post by demonx » Sat Jan 19, 2019 8:45 pm

WJ Guitars wrote:
Sat Jan 19, 2019 4:36 pm
The timber grain is looking great. How many more coats will be applied for the final finish?

Wayne
https://wjguitars.wixsite.com/mysite-1
It depends if it sands smooth this time or not, if not then it’ll get a few more coats of sealer, if it stands flat then it’ll move to clear coats where I usually do three.

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