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Sanding a polished lacquer surface to reshoot color? http://mowrystrings.luthiersforum.com/forum/viewtopic.php?f=10123&t=46727 |
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Author: | dzsmith [ Wed Nov 25, 2015 7:19 pm ] |
Post subject: | Sanding a polished lacquer surface to reshoot color? |
During polishing, I found some defects in the color layer. I plan to sand and reshoot lacquer. What's the finest grit of sandpaper that I can use? I don't plan to sand down to wood, and my new color layer will be more opaque. I was going for a red/black non-uniform look, (blood) but now I will do a single color. Thanks for advice, Dan |
Author: | B. Howard [ Thu Nov 26, 2015 5:46 am ] |
Post subject: | Re: Sanding a polished lacquer surface to reshoot color? |
Depends on the type of finish we are talking about but 600 would be as fine I as ever go to apply more finish over. |
Author: | mechanix [ Thu Nov 26, 2015 7:29 am ] |
Post subject: | Re: Sanding a polished lacquer surface to reshoot color? |
Yes Dan from my auto painting past 600 wet'n'dry is your paper for this. 800 would be fine too but wouldn't go any higher in fear of not getting a good bond with the previous coat if you know what I mean. |
Author: | dzsmith [ Thu Nov 26, 2015 9:25 am ] |
Post subject: | Re: Sanding a polished lacquer surface to reshoot color? |
Thanks guys, I'm using Behlen nitro. I'll use 600 wet to try to maintain the levelling I've already done. I figured nitro would melt into the existing nitro, but was not sure since it was polished. Dan |
Author: | Freeman [ Sun Nov 29, 2015 12:59 pm ] |
Post subject: | Re: Sanding a polished lacquer surface to reshoot color? |
Dan, I had a similar problem with the 335 - there was a flaw in the clear coats (10 or so) but not the color underneath. I took it to a friend who paints custom motorcycles (all the flames and stuff) - he said to sand back with 400 wet and dry until the sludge turned pink (indicating that I had just hit the color layer), then hit it with 600 and reshoot the clear. I masked the area around the flaw and tried to feather the clear into the old finish but there was still a significant ridge that had to be feathered (starting with 800) before the final color sanding and buff. Btw - if you used any wax or anything like that in your polish you know you will have problems with subsequent coats of lacquer. Here are a couple of pictures of mine - it was a hairline crack in just the clear running from the switch (the highlight is on the crack) after the repair |
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