If you are skinning these parts then all you need to do is remove the rubber on the dash panels first, then sand (key the surface) then clean again with soapy water, dry, and then paint a 1st coat of resin straight onto the part, wait for it to become tacky (so it sticks to your finger but no resin comes away on your finger when you pull away) then you can put the carbon cloth onto the part.
Plain weave is better for more complicated parts as it’s a little easier to work with than twill for instance.
Once the carbon is flat to the surface then add another layer of fresh resin, wait for it to go hardish (4+ hours) then Key again with 1000 grit, clean, then add another layer of Resin, then leave for 24 hours to go hard.
Then you can go to work on polishing the part, flat it first with 400 grit, then move up the grits, 400, 600, 800, 1200 ,1600 and then 2000 really put the time in on this as the more time you spend with the finer grits the better the result, when using 1200 - 2000 make sure you use lots of water and soap and clean the part regularly when doing it, once you are happy with the finish use a polishing compound to bring it to shine - job done.