pesky - causing irritation or annoyance; "tapping an annoying rhythm on his glass with his fork"; "aircraft noise is particularly bothersome near the airport"; "found it galling to have to ask permission"; "an irritating delay"; "nettlesome paperwork"; "a pesky mosquito"; "swarms of pestering gnats"; "a plaguey newfangled safety catch"; "a teasing and persistent thought annoyed him"; "a vexatious child"; "it is vexing to have to admit you are wrong"
≡annoying, bothersome, galling, irritating, nettlesome, pestering, plaguy, vexatious, vexing, plaguey, teasing, pestiferous

↔disagreeable - not to your liking; "a disagreeable situation"

"shavings " sont les résidus, pas le processus.

"Aluminum Shavings - American Elements
http://www.americanelements.com/aluminum-shavings.html
Aluminum shavings are a byproduct of milling and grinding metal operations. Shavings are produced from the shaving or cutting of metal and then collected for recycling."