Look up electric enclosures online. There are lots of different styles & sizes available. Something like this.
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I did a pretty decent search, but I didn't come up with much that caught my eye, though that's a pretty cool one.
I found this on waking up the beast thread.
I found that one on http://www.polycase.com/ . Just my opinion but I'd rather deal with a box than tape or coatings. Especially if you have to work on it after you've put all that crap on it.
I've used this system for two years and really like it. Nice job. Love the Battery box. You could use the master cut off switch that mounts inside the trunk and is activated with a steel rod with a small T handle. Only needs a small hole to run through and you can remove the T when not at the track. I can't wait to see the box for solenoid. Maybe there is room behind the Battery Box for both the switch and the solenoid. That would use space not accessible by golf clubs or baby carts.. Dave
Your kidding, is that your positive battery cable plastic tied to the exhaust pipe and drive line?
Sure hope you don't have a major short when that battery cable melts threw.
I don't think there's any melting danger from the exhaust. Unless you warm up the car for a REALLY long time, the driveshaft will tear the cable away from the exhaust long before the insulation starts to melt. No Problem!