I'm no longer a workout person anymore...
use to be very skinny.... 5'10, 130 lbs...
started working out for quite some time, and then, a little better... around 155-160 lbs...
From cannot really bench press, to be able to bench bodyweight... (well... not anymore...

)
my limited experience is if you want to boost single rep bench press weight,
- you'll need someone to spot you to make sure in case you don't make it, you won't kill yourself...
- make sure that guy can actually help you if you can't make it, cos when I first start, I spot for my friends who bench like 170... when they're running out of strength, I was trying REALLY hard, but not much help... (well... luckily, he didn't get hurt....)
- also, to boost weight, you want short sets and reps..
3 sets of around 6 reps - boost strength....
when I mean 3 sets of 6 reps... I mean you use heavier weight so that you can normally do 5 reps, and the 6 is the "boost"... (that's why you need a good spotter...)
to push yourself to higher limits....
my friend who is like 170lbs... he can bench 250lbs for like 3 times....
he told me its not only just muscle, but also technique....
well.... I haven't been working out for a while.... but play golf once in a while (that's some walking...

) so, take it at your own risk.....