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Frank, This is what I would do to get a starting point.
I would use a brush on them tractors the for the first wash to brake the static berrier.
The next time, i would use my acid at 100%, with my downstreamer set at about 10% draw.
Apply a pre-spray for the dead bugs. Tilt the hood. Apply acid[hot-downstream] from the engine back. Bottom to top[no higher then the door glass] in a zig zag, up and and down pattern. When i got to the back of the rig, twist the handle of the duel lance and shoot the remaining acid on the rims[extra dose].
Walking back to the cab as soon as i had [hot upstream soap] use it on the glass.
then start washing from bottom to top, it should go fast.
Then do the same for the other side and include the rear.
Then move to the front. Shoot some soap down the first side you did to keep it from drying.
Then acid the hood and wash that. Go to your wash unit, turn off the soap and heat.
Tilt hood down and use remaining soap to wash the front of the hood and keep everything wet.
As soon as you get clean water start to rinse from the top of the cab down. If you get hung-up[time wise] you will need to spray a shot down the sides to keep everything wet.
You need to move your butt.
As you learn and get faster you can apply more chem at one time to the rig and get it off before it dries.
So its acid[step 1], then soap[step 2] then rinse[step 3] but you used a bug pre-soak so [step 4]
glass, alum,chrome is where you want the shortest dwell with the acid, and keep it the wettest with your soap.
There are lots of soaps out there, i never used your brand, i would ask around and try another.
If this is not getting you the results you want up the % of acid. If at full flow rate your still not getting the results you want try a acid thats just HF, no PH.
iF THE WIND IS NOT IN YOUR FAVOR , CHANGE THE DIRECTION OF APPLYING YOUR ACID.
MAKE SURE THE WIND IS NOT CARRYING IT TO ANY OTHER TRUCKS.
WIND OR HEAVY RAIN ARE THE ONLY 2 THINGS THAT CAN STOP YOU FROM WORKING THAT DAY.
Have I learned very much BIGBOY? I can acid the whole rig now and then wash, so lond as its not too hot and its not a black truck.
when i say hot water, i mean about 100 deg. not 150 deg. other wise it dries too fast and/or causes problems.
Im still learning, come on give me some advise on my advise.[make sure you use the right kind of injector for acid- call MARK]