Arachnid Eradication...

A question for those who might have worked as exterminators putting themselves through college... Are there any potential risks to my old beauties by bug-bombing the garage? I have had enough; I am still recovering from the effects of a black widow bite I sustained while (stooopidly) reaching inside the main cabinet of my HP-3000/37 the other day. Not too serious, apparently I'm not particularly allergic and it was a rather mild bite, but I've felt like I've had the flu for a few days. My doctor was amused that I got it fooling around with computer artifacts, though, which led to me possibly (crossed-fingers) inheriting some nifty old proprietary medical gear. I'd like to just set off a few foggers in there, but my dilemma is that if I cover up the gear with plastic well enough to keep the spray out, the nasty little bastards may survive. Anyone done this? Thoughts? Aaron