ʻO ka pena paʻi pena, ʻike ʻia hoʻi ʻo ka mea wehe pena, ka mea hoʻomaʻemaʻe pena a i ʻole ka mea wehe pena, he wai i hui pū ʻia me nā solvents e like me nā hydrocarbons chlorinated, ketones, esters, alcohols, a me benzene series. Me ka hoʻohana ʻana i ka hiki o ka solvent ke komo a pehu i ka uhi, hiki iā ia ke wehe maikaʻi i nā uhi uhi ma luna o nā substrate like ʻole (nā pena, nā uhi, etc.). Hiki ke ʻili pololei i ka pena a i ʻole ka maʻalahi o ka ʻili ʻana o ke kiʻi uhi. Loaʻa ka hopena hoʻoneʻe pena o ka peʻa pena ma o ke ʻano o nā kaʻina hana kino a me ke kemika e like me ka hoʻoheheʻe ʻana, ke komo ʻana, ka pehu, ka ʻili a me ka pane.

Hiki ke hoʻohana ʻia ka pena ʻili no ke kila Carbon, Galvanized sheet, Aluminum alloy, Magnesium alloy. A loaʻa i ka 200 kg / barela a i ʻole 25 kg / barrel, ka manawa mālama: ~ 12 mau mahina i loko o nā pahu pani, kahi malu a maloʻo.