There are a few things I learned when using these products so I thought I'd pass it on (may not be in exact order) ..........
if you muratic acid your tank (I used a 50/50% MA/water solution), have a nice large tub to catch the last remainder of it that you must shake out of the fill hole, I have never found to get it all out by the petcock hole alone
with Red Kote there is no need to MA the tank (Kreem there is), but I did mine anyway
the tank may spring pin hole leaks from removing the rust so tape them up before doing the liner. The liner seals up to a 1/16" hole I think they said. You can also patch them with a few products made to do so from auto part stores .
make sure you have the set up figured out as to how you are going to prop the tank once you drained the liquid liner out (some tanks do not naturally sit how you would want them to because of the shape or petcock location)
when draining, have a good flashlight so you can watch the flow of it so you know which way you still must tilt tank for best flow out of the petcock hole.
depending on the tank, it is really hard to not get minor puddles out, which are a no-no. I had two very minor ones so I left the tank dry 2 days before applying the second coat. I think in 12 hours it was totally dry but I wanted to make sure that the slight puddles (very slight) had full chance to cure as much as possible
the baffel in picture certainly makes it a bit tougher for draining.it was a real pain actually
this is my 1st tank with red kote (did three with kreem through the years) and I really don't find it to flow any better then the kreem. I thin both products out with acetone which they do say you can do so
have some Q-Tips to clean out the petcock hole so the liner stays as thin as possible. If your doing two coats, it's best to use a wire brush and clean it out so there is none on so second coat flows out as good as 1st
the lip in the fill hole will usually not get an even coat and it's best to tape off the fill hole rather then use the cap itself, I used the cap and itlooks like crap now, so I'll wire wheel it all off and just give it an even dunking of the stuff so it will look uniform