On the money Gav as I too was worried with the 'Chemical Wash' on the Swampcaster but when starting after 5 or 6 coats (can't remember and should write things down) did things ever so lightly with 600 and it didn't cut too deep, in fact very hard to tell how many layers of TO it went through. If I had to guess, possibly the last 2 but no more.

Just finished 4th coat wet sanded with 1200 about half an hour ago and also ran out of TO with more on it's way but due to arrive towards end of this week. Looking very satin at the moment but oh so smooth. Will do a couple more wet sanded coats with 2000 later in the week and then start thinking about commencing the micro mesh side of things. Back of neck has only had 2 x 1200 coats done today and it is coming along nicely too.

The main trick with this method seems to be thinning it down with mineral turps to a 50/50 ratio and keep rubbing in small sections with a small piece of wet & dry paper (I'm using bits that measure about 75mm x 50mm) until that section goes dry then add a bit more of the brew to the paper to do the next section. Dipping the paper in the TO brew doesn't work so good and by pouring a small amount onto the paper you can then tip excess back into the container so that you can avoid a very wet and sticky surface to work with.

Doing it this way also helps with sanding out any spots and runs from a prior coat but if done properly there shouldn't be any and only other issue which is same with any product and technique is the stop and start lines if you do top and back in separate sessions. I tend to do one face and sides then hang it up to do the remaining face and switch to last face to work on first for the next coat, and so forth to avoid any uneven build up.

All trial and error but you quickly learn what works and what doesn't.