Sand and prime again. Sand and prime, and once you get it going smooth, move up to finer grade sandpaper. You'll want to be on the 350 or so grit before ... Show morefinal coating.
Just about there. More sanding and primer to see where I need to sand. I didn't wet sand but you very well could. I knew I was going to use a textured paint so I wasn't OVERLY anal about the smoothness.
First coat of a charcoal grey metal finish for outdoor furniture with a slight texture that I thought mimicked the texture of the interior of the 5. It's also a dark grey, not black, and that seemed to match well.
Dry run installing the ID8. My first one was defective (bought here and returned here for a new one) The guys here were great to deal with. The first ID8 didn't sound good which made me nervous about my hard work. A few days later and aI had a new ID8.
I ran the wire under neath the side panel, just pushed under the edge and removing the rear jack section gives you access to the rear of the side panel. You can fit your hands down the side and notice the bottom is two pieces. This allowed me to wiggle a wire thru the bottom of the compartment without drilling. I left enough wire to be able to make adjustments outside of the compartment.
I bought some dampening material, Dynamat type stuff at WalMart and put a square piece on each inside wall. This should help with the reflections from the tin sounding fiberglass.
Since the enclosure is small, you need Polyfill to fool the speaker into think it's larger then it really is. This part is guess work, I stuffed it without making the Polyfill forcibly packed where it would not allow air to move thru and around it.
I painted my screws black, and used a door weather strip from Home Deport around the inside baffle to help seal air. This is the final look.
With the chair up in place I have clearance from the bottom tire access panel and to allow the hook for the cargo net to attach.
Overall, it's quite nice. The bass hits hard, tho I only have 100w or so feeding the ID8. I may upgrade in the future if I can find a 4 channel amp to fit under the front passenger seat. I sounds really nice, better then any small enclosure that would take up space that's for sure. This takes up zero space (didn't know about the compartment so I didn't use the space) and is non permanent. I'd hate drilling or mutilating a month old sweet ride such as the 5.
I hope I didn't confuse anyone with the step by step. I'll try and proof read it sometime, so forgive my writing if there are errors littered everywhere. Show Less