MIMF

Any recommendations on a small, hopefully inexpensive, compressor for spraying KTM-9 with a gravity feed HVLP gun? Will be used for this only, not air tools.

Craig

Maybe I should have said the spec on the gun is "3.2 to 5.6 @ 43" which I take to mean 3.2 to 5.6 CFM @ 43 PSI.

CB

Craig, I'd look for an oil-less compressor so you don't have to worry about oil contamination in your air. Perhaps for occasional use this HF model could work for you, http://www.harborfreight.com/air-tools/ ... 68149.html You'll probably do even better checking craigslist locally for a better brand like Senco, Hitachi etc.

I thought KTM-9 was out. Seems like most folks had migrated to Target coatings EM6000. I have a gallon of the EM9000 on the way to use on my interior trim. I notice it says specifically for use on guitars but there are no references to it around here yet. It could be that it doesn't burn in as well as the EM6000 or that luthiers are just a bit reluctant to jump ship for obvious reasons.

Oilless compressors are noisier than oil lubricated ones, and need more frequent service and repair. A filter/catch can easily be added to the system to catch any oil or moisture. I have been using a 2 1/2hp compressor for more than 15 years with no oil contamination yet. I think a 1 hp compressor could do the job for spraying, but it is nice to have more air than is needed rather than not enough.

I'd have to agree with Michael on that. I was given a Devilbiss "speedway" 2 HP compressor many years ago after it had served two other luthiers quite well for the 40 years before that. It's still going strong and can easily be rebuilt. I wouldn't hesitate to buy one like it used knowing that it can be brought back to working condition for a minor investment in parts. Just don't scrimp on the air filter. That said if you don't plan on using it more than one or two hours a month then maybe a cheap pancake compressor will get you on your way albeit noisily. If you have room for the 20 gallon tank, have a dedicated 20A circuit and plan on building dozens of guitars then go for the 2+ HP oil version.