Polyurethane over Polyester Resin?

[Fibonacci]

I have an oddly shaped custom pen I am making for a friend that I am debating on how to finish.

The main body is african blackwood with a segment of PR. It is closed end with the end being a crook ok PR. I would like to put some kind of finish on the african blackwood to bring out the grain and give it some shine, but I can't use CA because of the shape of the crook would make it near impossible to sand and polish. I am considering using spray polyurethane, but I don't know what it would do over the PR.

Anyone have some insight on this?

I have tried just hitting it with BLO, but it looks great until the PLO soaks in, then the grain disappears again. Maybe I just need more coats of BLO? For the theme of the pen, raw wood works, I just want to grain to pop better.

Oh, it has to be done by Monday as well...

 

[bitshird]

I'd use Wipe on poly instead, put on about 10 or 15 coats, (they dry in warm weather in about 30 or so minutes), then polish it with Brasso polish.

 

[Fibonacci]

Will the wipe on poly be okay over the PR? I can't really separate out the pieces for the finish.

 

[mredburn]

I have finished ca on my wood clips I made on my "all wood pens". You just have to put it on and then hand sand it down through the grits. I start at 320 to smooth it, then 600.800, then to micro mesh 3600.4000 etc down to 12,000. In tight spots, a small buff on a flex shaft or Dremel with white diamond and a drop of Hut plastic polish makes a slurry that will shape and polish a light touch is required. Take to much off? clean and drya nd add ca back on the bare spot and buff it back in.

 

[DozerMite]

I have used poly over PR a few times without any problems. I went over it with 320 grit before spraying and then just finish as normal.