Dark, heavy (oily) ashes are usually from two things.
First, most likely the soil wasn't properly flushed of nutes before harvest.
Second, likely the bud wasn't properly cured.

Some folks do not cure their indica's, thinking they smell and taste fine. For some strains, that's true. Well...except for the uneven burning, dark-oily ashes that are more embers than ashes, and that ammonia taste that ruins the flavors and give you a nice headache. (possibly why you think they may have been sprayed with something...?)

If properly flushed and cured there should be a light and loose greyish to whitish ash left in the ash tray. Joints burn more even, Flavors are sweeter, and no chemical aftertaste. :thumbsup:

There's a curing thread here somewhere. You can moisten your buds just a tad, put in a glass jar, and finish curing them. (if you haven't already smoked it)
Rusty Trichome Reviewed by Rusty Trichome on . a newbee in need of help!!!??? hi guys just joined this wicked site, surprising how much info can be shared , real useful. this is my first time posting so forgive me if im in the wrong area or even if the right site at all for the question .bit of a wierdo one,. im sure one or two of you have been stitched up before by bud that doesnt smoke properly ie. somewhere along the line its been sprayed or coated in something......would like to know what it is, but more importantly is there a way of getting it okay to Rating: 5