Hi Will, first coat should be ,like matt said ,but more 25% thinner in the mix. If using a spraygun open the fan right up to just below full width of sray capacity. Mist coat the hulls, so it is not a good cover. wait 30 mins or until just touch dry and then spray a wetter coat ,When spraying don't stop with the material still coming out. set your self up if possible to walk the entire length of the hull without stopping, start material feed (trigger) past where you want to begin and keep a steady arm as you walk down the hull,finishing past the end of the hull. Sand down when dry with 180 aluminium oxide sand paper,(white roll) repeat spraying proceedure again a little wetter coat this time .Full strength coat (no thinners) you may have to go a little slower this time. But not to slow(runs) This shuold leave a orange peel type finish to the paint work. wait 7 days for curing and a good buff with some water rubbing compound to take out orange peel and you can comb your hair in the finished product. Using less paint only means thinner coats . Less protection , the trade off is individual. just remember how much work you have already done .Even 5 litres of A&B polyurethane once dry does not weigh up to much at all. regards Brett.