Need some advice, please. When I began bucking the 426 rivets in the HS skin, the first five or six marred the surface slightly. Brand new swivel rivet set from Isham. I had the pressure set about 42 psig, but later learned it needed to be lower so I've been using 34 to 36 psig lately with good results.
These marks shouldn't make a hill of beans since I'm planning to have the plane painted, but why it happened has me puzzled. After driving the first two rivets I stopped and lightly buffed the rivet set face with a polishing compound, then tried it again, and same thing happened. Then, for who knows why, after about six or seven rivets the problem went away. I've posted pictures below.
If you've seen this before I would like to know what caused it in case it shows up again.
By the way, I have no idea if I've inserted the pictures right or not. The first is the marred skin, the second is several rivets later, probably 20 or so.
http://img214.imageshack.us/img214/1754/dsc0051za.jpg
http://img849.imageshack.us/img849/2839/dsc0053pr.jpg
These marks shouldn't make a hill of beans since I'm planning to have the plane painted, but why it happened has me puzzled. After driving the first two rivets I stopped and lightly buffed the rivet set face with a polishing compound, then tried it again, and same thing happened. Then, for who knows why, after about six or seven rivets the problem went away. I've posted pictures below.
If you've seen this before I would like to know what caused it in case it shows up again.
By the way, I have no idea if I've inserted the pictures right or not. The first is the marred skin, the second is several rivets later, probably 20 or so.
http://img214.imageshack.us/img214/1754/dsc0051za.jpg
http://img849.imageshack.us/img849/2839/dsc0053pr.jpg