I got my sample the other day so I tried it on the hood of my 09 XB, I have a Flex 3401 (I had to be carefull cause the pad was smaller than the BP). I was trying to take pictures of it but it is white and super hard to capture the swirls in it. I did post pictures of the door from a 69 Ghia that hasn't been touched in god knows how long.
This was after one pass (on the left) with little pressure.
This was after two passes, this pass I put quite a bit of pressure down.
You can see the difference, the deeper scratches and rids weren't taken completely out but it cleaned up nicely.
The right side I decided to try out SIP on a white LC to see how it compared. After two passes, I don't think the it had the clarity that HDU left after two passes. Plus SIP doesn't have HALF of the work time that HDU has. This stuff is like OP, it just keeps on going.
I made another pass on the right side but this time with HDU
You can see the drastic change in this picture.
The only problem I had with the polish was on the edge of the passes I was doing, if you didn't overlap them the polish was hard to take off cause I guess it wasn't broke down enough. After a full pass when I was done it left like shadows of where the pad had been It may have been the humidity, or the heat caused by the lamps but this was when I was working on the Scion not the door. On the Scion I did one pass and it worked well, but the second pass with pressure it took out whatever was left(swirls). There were a scratch or two that didn't come out but removing the swirls worked very well. I like the polish cause it works well, the passes are smooth, and removing the polish(on the door) was pretty easy. I want to try it on my girlfriends VW CC and see what happens since I'm hearing the harder the clear the better. I hope this helps
This was after one pass (on the left) with little pressure.

This was after two passes, this pass I put quite a bit of pressure down.

You can see the difference, the deeper scratches and rids weren't taken completely out but it cleaned up nicely.

The right side I decided to try out SIP on a white LC to see how it compared. After two passes, I don't think the it had the clarity that HDU left after two passes. Plus SIP doesn't have HALF of the work time that HDU has. This stuff is like OP, it just keeps on going.

I made another pass on the right side but this time with HDU


You can see the drastic change in this picture.

The only problem I had with the polish was on the edge of the passes I was doing, if you didn't overlap them the polish was hard to take off cause I guess it wasn't broke down enough. After a full pass when I was done it left like shadows of where the pad had been It may have been the humidity, or the heat caused by the lamps but this was when I was working on the Scion not the door. On the Scion I did one pass and it worked well, but the second pass with pressure it took out whatever was left(swirls). There were a scratch or two that didn't come out but removing the swirls worked very well. I like the polish cause it works well, the passes are smooth, and removing the polish(on the door) was pretty easy. I want to try it on my girlfriends VW CC and see what happens since I'm hearing the harder the clear the better. I hope this helps