Right.. The best thing to do is get some wet/dry sand paper consisting of 120, 240, 400, 800 & 1200 grits.
Starting with the 120 and gently rubbing down the coats till all chips are near gone. Then use the 120 grit with a bucket of water (soapy is good) and work in circular motions gently, continue using the 240, 400, 800 & and finally finishing with the 1200. (1200 being the less corse grit) to get the smoothest matt finish.
Then the next stage is to get it coated with the epoxy resin (top coat). You can do this yourself but for best result like me, send it away to get professionally done. Like I found out the hard way after buying the kit & doing it myself and having to prep again. Contamination and accuracy of resin mix is vital!
Its best to send away to get treated with a professional environment to work in, free from dust and dirt settling.
I used a guy called perky. Use my name Alex as reference and mention the CSL splitters and he will know what work to expect if you have completed the sanding prep, ready for him to coat.
It should cost you around £75+ if you have done the prep, but if you wanted him to do the whole lot he would do.
Contact him via email:
perky@perkinsautomotive.co.uk
Mobile: 07731868102