Boony,
The reason you bike is a dust magnet is a result of static buildup!!!
This occurs from rubbing of the plastics.
I detailed for over 10 years and there is an easy cure.
After you have finished polishing and have removed all residue, spray your bike with water from an atomiser (water sprayer) with clean cold water and simply wipe over with a good quality, clean chamois.
This will remove the static which in turn stops the dust build up!!!
Word of warning though, don’t try this trick if you have used Gold Class polish, as it will certainly cause “water spotting” .
As for the silicon spray to help prevent mud and dust sticking like a bitch, any of the non stick cooking sprays will do the same job for alot less money and won’t effect your brake discs/pads if they accidently get sprayed.
Hope this helps
Cheers
P.S. If you get annoyed by the white residue that Wet Look leaves around edges of your decals etc, change to NXT as it does not dry “white”.