I have run my extract over alumina for a long time. There are two modes that work.
I posted one in which you preboil the extract in order to swell up the green gunk and then you catch chlorophyls and waxes both. This works best using isopropyl alcohol at 70/30 iso to water.
Methanol is a better choice for wax removal if you elect not to pre boil. Methanol is very polar and when allowed to denature the extract at room temp all that gunk will roll out of solution pretty fast. Then pulling this through a prewetted alumina column grabs the waxes. However pre boiling in methanol is ineffective for swelling up the green gunk because it does not form an azeotrope with water so it boils away too fast.
I can confirm the procedure works very well. I used to have a video on YouTube showing it but just give it a try. 220-400 grit works well but 400 is very slow. I use abrasive grade from Amazon. Brown or white both work the same. This works best when you cut the alcohol with water. Rubbing alcohol comes pre mixed at my corner store at 70/30 iso to water. I add at least that much to methanol for this procedure for complete clean up. The idea is to make the methanol or iso solution less able to disolve things by adding water. I prewet the alumina with water as well. You will see pinene elute first if present doing this as water white fluid and this is normal.
The process has worked for me for a very long time.