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mistermikev

what do you know about nitro lacquer?

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4 minutes ago, mistermikev said:

still suing

All I have are these worthless guitars I made. One of them needs refinishing.

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Can't believe I missed this one. Here's some crap off the top of my head. 
I setup a temporary booth outside using a very large plastic sheet stapled to deck posts under deck. It makes a largish space, maybe 15 foot square. I pull the spray gun and hose under the sheet and hang it on a nail on a post. Compressor stays outside between this booth and the shop. I'm wearing a full Tyvek suit, head sock, respirator with organic vapor cartridges, and it fits tight. Some kind of eye protection. This is all critical. Holding breath and hoping you don;t breathe overspray isn't even close to OK. That sent me to the ER once, and was very unpleasant,  though it was something worse than nitro. 

I've got desiccant balls, and dry traps inline between the gun and compressor which is critical for nitro. You do not want any moisture coming from the tank or hose to be trapped in the finish. That causes the dreaded cloudy milky haze. ScottR had good advice on coats and frequency. I will tell you that I always push the limits here because I'm gambling on humidity and weather with my temporary outside booth. You decide the ratio of nitro and solvent that you spray, there are different mixes for different stages, for instance a higher solvent ratio for a final light pass can help flow out. I'm always pushing how heavy my coats are, and how many I can get on and have been lucky so far. I wouldn't spray unless I had some blush eraser on hand, it's amazing. It will work days after you spray, but I think there's a point in curing where it has reduced effectiveness.

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I just bought a "portable" greenhouse off Amazon to spray in. Yeah it was $80, but it's awesome. Goes together easy, take it apart for the future. Super handy as a ghetto spray booth to avoid particles in the wind (a must if ever doing a solid color IMO).

Chris

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Just renewing my lease of @mistermikev's thread as I'm almost ready to spray some clear nitro over my stained and sealed body.

Based on what I've read above from the experts among us - My plan is to spray say 3 coats per day (an hour or so apart), until I've got > 1o coats, leave it a couple of weeks then do a level sand, then leave it a further week or so before finishing my level sanding and buffing...

Does this sound like a good plan or is it fraught with disaster? 

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as you know no expert here but having done it with the watco nitro in a very dry climate all sounds good except you may need more than 10 coats (very thin for me).  I would plan to spray it up and do a wetsand right away to see if you can get to a very smooth surface before you start the 'waiting weeks' because you'd hate to wait and find out you need more clear.  also... given your wet climate you may want to wait a little longer between coats. 

just some newbie thoughts.

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On 8/19/2019 at 7:55 PM, mistermikev said:

as you know no expert here but having done it with the watco nitro in a very dry climate all sounds good except you may need more than 10 coats (very thin for me).  I would plan to spray it up and do a wetsand right away to see if you can get to a very smooth surface before you start the 'waiting weeks' because you'd hate to wait and find out you need more clear.  also... given your wet climate you may want to wait a little longer between coats. 

just some newbie thoughts.

Thanks bud, I've just done my first light coat, I was nervous like my first ever truss rod route :D Did it outside with a long sleeve, mask and goggles and gloves, could still smell it occasionally so opted not to breath. Definitely won't he spraying it in my garage, might even invest in a full face mask. I think my only options are to do 2 coats per day pre and post work given that I need the light. Luckily I discovered how awkward it is to hold the guitar and spray the sides at the same time, especially the bottom, so I put it it on a shoebox on the workmate so I could walk around it and spray the sides evenly, then held it by the neck to spray the back and front. Hopefully it comes out OK.

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well the good thing is.. at least in my experience... it's a very forgiving finish afa if you get a divot/blemish because new coats actually melt into old coats.  stuff smells something aweful tho.

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