finishing purple heart problem

  • Advertise with us

« back to Woodworking Skill Share forum

Forum topic by Mike posted 03-04-2010 08:56 AM 1489 views 0 times favorited 7 replies Add to Favorites Watch
View Mike's profile


93 posts in 3432 days

03-04-2010 08:56 AM

Topic tags/keywords: question purpleheart finishing

I built a box out of purple heart with with maple corner keys or feathers and whene I put the clear finish on (wipe on poly) I have white showing in the grain. Seems to be sanding dust that wouldn’t come out. I vacumed and wiped and used a damp cloth but still had white in the grain.

Really frustrating as it’s not real attractive. Any ideas on what I did wrong.

Thanks for the help.

-- Mike, Cantral Oregon

7 replies so far

View Eagle1's profile


2066 posts in 3332 days

#1 posted 03-04-2010 12:53 PM

Purple Heart is a very hard wood. Go back and start with about 80 grit and then up..

-- Tim, Missouri ....Inside every older person is a younger person wondering what the heck happened

View richgreer's profile


4541 posts in 3342 days

#2 posted 03-04-2010 03:22 PM

Blast it with a shot of air from an air compressor at 80 or higher psi.

-- Rich, Cedar Rapids, IA - I'm a woodworker. I don't create beauty, I reveal it.

View Bob42's profile


456 posts in 4058 days

#3 posted 03-04-2010 03:46 PM

You might have raised the grain with the damp cloth and when you apply your finish the fibers is what you are seeing. I would re-sand, then before I apply my finish I always use a tack cloth with light pressure. Also make sure it’s not coming from the cloth. Try a sample piece first. I hope this helps.

-- Bob K. East Northport, NY

View Mike's profile


93 posts in 3432 days

#4 posted 03-04-2010 06:39 PM

I had read about useing mineral spirits on a wipe rag on a dust removal post recently. Does that raise the grain?

-- Mike, Cantral Oregon

View TopamaxSurvivor's profile


18461 posts in 3943 days

#5 posted 03-04-2010 07:23 PM

I don’t think mineral spritis will, but water definitely will.

-- Bob in WW ~ "some old things are lovely, warm still with life ... of the forgotten men who made them." - D.H. Lawrence

View SnowyRiver's profile


51457 posts in 3748 days

#6 posted 03-04-2010 09:40 PM

Hey Mike…is the white in the grain all over the piece, or is it mainly near the corners? I was wondering if you might have yellow glue in the grain from the glue up.

-- Wayne - Plymouth MN

View Mike's profile


93 posts in 3432 days

#7 posted 03-04-2010 10:07 PM

no it’s not glue. Its all over.

-- Mike, Cantral Oregon

Have your say...

You must be signed in to reply.

DISCLAIMER: Any posts on LJ are posted by individuals acting in their own right and do not necessarily reflect the views of LJ. LJ will not be held liable for the actions of any user.

Latest Projects | Latest Blog Entries | Latest Forum Topics