I saw once a paint booth made of the interior plastic shell from a dishwasher. Resting on a side the bottom opening was fitted with a filter and a fan. Then an aluminium dryer duct sent the fumes out trhu a window. Pretty neat and cheap.
____________________ Junk is something you throw away three weeks before you need it.
Hi Si. I fixed up a cheap and cheerful booth from a plastic storage box (Tesco's I think), a dryer hose and a 12V computer cooling fan (biggish). It exhausts to the outside by hanging the hose out of the window but is pretty effective for aerosol spray jobs (I haven't ventured into my airbrush kit yet!).
I know this doesn't just filter without external exhaust but it works for me. The newspaper is just a method of keeping the box walls a bit cleaner than they might otherwise become with overspray.
Being fairly light weight, it has the advantage of being portable so can be moved to anywhere I have a 12V supply - and a window! - and I used hot glue as it sticks better to the poly box material and acts as a sealant at the same time.
Yes Si, the transparent (nearly) box got me out of the job of fixing an additional light as there's plenty coming in from the room lighting or even just daylight for the use I make of the contraption. I do only use it for spray can work though, any detail stuff being good old brush painted!
I built mine from 3/16" foam board. Dryer vent duct to 3" 12vdc Attwood bilge blower fan to 3" duct to filter box in the window opening. My paint booth is solar powered - PV panel to 5A charge controller to 12v 20ah battery to paint booth fan and LED light strip inside top of spray booth. Will post pics later - I have to use my DSLR to post photos here as my phone will not take a sufficiently small photo.
____________________ Model railroaders are alchemists: We turn gold into rusty iron.