Any of the canister filter/regulators do a pretty good job,
like this one. (astro has a cheaper one)
http://search.cartserver.com/search/...ywords=SHP6720
I run all my air through one like that first, then branch out to
two different lines, one for all my sanding and general air supply
left at 90 PSI.
The other goes through an additional regulator to adjust down
and is used for only painting.
I also run the paint line air through an additional Motorguard filter.
These are great, they have a filter that looks like a roll of toilet paper.
You can remove it and dry it out if you need to.
http://www.spraygunworld.com/product...uard%20M30.htm
Just make sure what ever you get, that it's rated for more CFM than
you will be ever useing.
The bigger ones will have fittings bigger than the std 1/4" NPT
found on the smaller units.
Here's my set-up, kinda done quickly, someday I'm going to redo it a little neater.
The 1/2" blue line is from the compressor. The 3/8" red goes to my woodshop.
http://i51.photobucket.com/albums/f3...c/DSC03217.jpg