Frank,
Megs 205 will provide great correction on a lot of different paints, (just not super hard paint). The thing is you need to first prime the pad well, then use 3 pea sized drops per 20~22"x20~22" section. That pad may indeed need to be an orange CCS or flat to start with.
By "section pass" that would be passing the pad over each square section, overlapping by 50% with each pass, until the entire section has been gone over. IOW's, starting at bottom left you would go L to R, R to L, moving upwards until you got to the top. That'd be a SINGLE section pass. :dblthumb2:
Working with Megs 205 keep in mind it's a SMAT based product and it'll cut hard from the get-go. It also doesn't need to be worked down a full 6~8 (section) passes like a DAT (aka Menzerna) product does. Reason being, SMAT products cut the same with each pass, just that spent product, abraded paint, trash on the surface etc. all builds up around each individual abrasive particle. Those particles will start to build up both on the surface, and especially in the pad. Generally you'll be better off with a SMAT product if you do no more than 4~5 section passes, wipe it down, inspect the progress, THEN if you need more cut/correction clean your pad, reapply 3 small drops and go back over the section.
Conversely, DAT products decrease in size (and cut) with each pass (BUT.... they tend to finish down a bit slicker). On many occasions you can work those products 4~5 passes, pull the pad away (machine turned off), spritz the pad with just a scoche of distilled water, use the same machine speed or just a touch faster (but a little faster arm speed) and then go back and do 3~4 more section passes BEFORE wiping off that product.

rops: