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Old January 17th, 2012, 09:08 PM   #1 (permalink)
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Seagrave Vinyl Sealer and Seagrave Nitrocellulose Spraying Lacquer?

I would like to know the working temps (outside) for Seagrave Vinyl Sealer and Seagrave Nitrocellulose Spraying Lacquer? As I am eager to start my Tele build.

Also would like to know how many coats of Seagrave Vinyl Sealer and curing time is required before sanding?

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Old January 17th, 2012, 09:32 PM   #2 (permalink)
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Seagrave is supposed to be duplicating the McFadden formula . You should be able to sand the sealer the next day , if I recall correctly . Use a light scratching with 150 , max , unless you have runs .
Two coats should be enough and only sand after coat one . Just enough to rough it for a good mechanical bond for coat two . Apply coat two and then spray your first nitro coat while still tacky , within one hour or less . This helps to provide a good chemical bond between sealer and clear coat . Yes , it is coming back to me now .
Wood prep is the key . If your wood is prepped well , spraying and the rest is made simple . Never attempt to cover bad/poor prep with spray .
Three coats of clear should be enough if you are good . I have seen it done !
By the way , if you have done a good job with prep , sealer and clear , you will only need to buff and not sand the clear .
Good luck and post some pics when completed .
Sorry , temp best between 55-65 with 50% relative humidity .
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Old January 17th, 2012, 09:46 PM   #3 (permalink)
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Originally Posted by otterhound View Post
Seagrave is supposed to be duplicating the McFadden formula . You should be able to sand the sealer the next day , if I recall correctly . Use a light scratching with 150 , max , unless you have runs .
Two coats should be enough and only sand after coat one . Just enough to rough it for a good mechanical bond for coat two . Apply coat two and then spray your first nitro coat while still tacky , within one hour or less . This helps to provide a good chemical bond between sealer and clear coat . Yes , it is coming back to me now .
Wood prep is the key . If your wood is prepped well , spraying and the rest is made simple . Never attempt to cover bad/poor prep with spray .
Three coats of clear should be enough if you are good . I have seen it done !
By the way , if you have done a good job with prep , sealer and clear , you will only need to buff and not sand the clear .
Good luck and post some pics when completed .
Sorry , temp best between 55-65 with 50% relative humidity .
Still a little to cold out, to shoot in the garage?

Its only in the 40's and nights get into the 20's around these parts, humidity is non-existent around here.
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Old January 17th, 2012, 09:50 PM   #4 (permalink)
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Does Seagrave Nitrocellulose Spraying Lacquer require thinning?

If so, how much Seagrave Nitrocellulose Lacquer Thinner to Nitro do I need to mix-up at what ratio?
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Old January 17th, 2012, 11:26 PM   #5 (permalink)
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Thinning is advisable . I will ask Dale . He is the man that instructed me and would know since he ran the finishing department at Martin for more than a few years before retiring . He never did compile the mixture schedules and whatnot that he promised , so I will bug him about it .
You could always contact Seagrave about what they recommend . The worst they can say is no and I doubt that they will since that would be bad PR for customers .
I will get back with you after the weekend unless someone else wants to chime in on this .
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Old January 20th, 2012, 11:54 PM   #6 (permalink)
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Thinning is advisable . I will ask Dale . He is the man that instructed me and would know since he ran the finishing department at Martin for more than a few years before retiring . He never did compile the mixture schedules and whatnot that he promised , so I will bug him about it .
You could always contact Seagrave about what they recommend . The worst they can say is no and I doubt that they will since that would be bad PR for customers .
I will get back with you after the weekend unless someone else wants to chime in on this .
I will be looking forward to this.
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Old January 21st, 2012, 10:01 AM   #7 (permalink)
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Thin it

Simply put, just go ahead and thin it. If your ready to spray material is thicker than water....thin it and use good quality thinner to do it. I have yet to see a true "ready to spray" lacquer when using shop spray equipment like most of us have. Get yourself some wet sanding papers and a good rubber block/pad too. Your gonna need them.
I dont know anyone that worked for a famous guitar company but I have painted guitars totalling somewhere in the three digits over the years.
Good luck on your project,
Rob
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Old January 21st, 2012, 09:21 PM   #8 (permalink)
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Still unsure of mixing ratio for Nitro to Thinner, also would like to know if Vinal Sealer requires thinning to, if so at what ratio?
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Old January 21st, 2012, 10:03 PM   #9 (permalink)
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I usually do a 1:3 washcoat of lacquer/thinner. Sealer and build coats 50/50 and the final coat after leveling is 1:4. No set rules, whatever works for you. Alot of product come at spray viscosity and they dont recommend thinning but I find you get a smoother finish if you do.

Some info
http://www.lmii.com/CartTwo/Nitrocellulose.htm
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Old January 22nd, 2012, 12:38 AM   #10 (permalink)
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I knew that some more experienced with spraying would add in . I will say that Dale simply knows how to thin what he is spraying and has no need to measure . I am not that knowledgeable or experienced and am grateful for having access to a man with his skills .
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Old January 22nd, 2012, 04:59 PM   #11 (permalink)
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Originally Posted by Shepherd View Post
I usually do a 1:3 washcoat of lacquer/thinner. Sealer and build coats 50/50 and the final coat after leveling is 1:4. No set rules, whatever works for you. Alot of product come at spray viscosity and they dont recommend thinning but I find you get a smoother finish if you do.

Some info
http://www.lmii.com/CartTwo/Nitrocellulose.htm
Thanks for the link. Just waiting for nicer weather.
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