OK well the write up is still coming but there is no way dirt can get in between them. It does get hot, but nowhere near as hot as the steel. It smells a bit for the first few rides when it gets hot. If I've had a hard ride it still gets a slight aroma. It has saved my pipe at least 3 times where I can say I would have been replacing my pipe (one crash sheared the head off a mounting bolt).
Part one
1. Remove pipe of bike
2. You need to cover the pipe in aluminium foil to stop the f/glass from sticking to it. A few layers is probably best
3. I bought the fibreglass cloth (a weaved matting rather than messy strand like crap)
4. I cut the cloth into different shapes like squares and strips
5. Then you basically mix up the f/glass resin and paint a layer onto the foil
6. Now start laying the cloth on building up the layers
7. Add a layer and paint the resin on, build another layer and paint again
8. Keep repeating until it is a few MM thick and let it set
9. Now it should be stiff enough to take of the pipe
10. Trim it to the desired shape
11. Re-fit the guard to the pipe and continue to layer the cloth and resin until it;'s your required thickness
12. Now to let that set and get your sand paper ready to get it all nice and smooth if you so desire
13. I just use a high heat engine enamel to paint it black
14. A few large hose clamps and your done.
What you can also do is when the guard is finished but the resin not set, tighten the hose clamps on the guard causing them to be recessed into the guard while it sets. If I have missed anything or you neeed photos of the materials just let me know, I'm happy to help.
MOST IMPORTANT THINGS ARE....
Wear gloves, protective gear, in a well ventilated area and TAKE YOUR TIME !!!
I was a bit scared to make it with f/glass but it was a piece of cake really.
BTW the fitment of my guard is a 'snap' fit, it really doesn't need any clamps but I put them on to be safe.