as far as i know.. aloe wont help in accelerating at all.. it conditions ur hair. if u feel like u need some conditioning done to ur locks u may well use it. but i wont even recommend it for really young locks. probably u should wait till ur locks get a bit mature.
lemon juice is citric acid.. it may weaken ur hair too much. so just dont use it.
u can make an accelerator at home.. use normal sea- salt (uniodized) with water. the ratio i think is 3.5% as laura said.. or u can even go to a beach n have a dip, play around for sometime, have fun and then go home and wash it off. dont let the sea salt stay in for too long or else it will dry ur hair n scalp too much.
i havent bought the sea salt spray in the shop here on the site.. but u could try that out, plenty of good reviews about it.. peace