Hmm, well most, even the cheapest compressors, go up to 8bar/100psi. If it isn't, you aren't plugged into the regulated output are you? They normally have two, one regged, one not.
If not, then as above, turn the wick up a little, the power difference between 70 and 100psi is quite marked.
Check your existing hose out first before buying a new one, I managed to open mine up with a drill bit, I eventually replaced it, but made a huge difference with high consumption tools
Even prior to fixing the hose I was able to squirt warm and thinned waxoyl, which is much thicker than what you have, with a standard degreasing gun with embaressing amounts of power inside a lightweight chassis, proper atomisation, and full internal coating.
With your current setup, perhaps just patience is the answer.