i soacked my hides in lye and scraped , worked good except some small patches. tacked it down , scraped , then added draino to get rid of some stubborn patches of hair and cartilledge. worked fair, they were translucent, when rinceing they shrunk and thickend. is this normal. how do i strech them to original shape, incidently, i wore rubber gloves but my urine had a strong smell af hydrocloric acid this morning. should i be concerned. thanks.