Advice on purchasing a sand blaster

[Crawdad]

I dont expect to sandblast my whole rig, but do expect to get seams and other hard to reach spots. I already have two water seperators on my compressor, tools last longer and work better when they are dry. I have many grinders and wire wheels to get the big areas. I guess I will be checking these out in the next few weeks:

Harbour Freight: 90 Lb. Pressurized Abrasive Blaster with Easy Fill Top Load Lid
Northern tool: Allsource 100-lb. Pressure Blaster, Model# 41600

Thx for the advice!