OK....why did this happen...?

[fanlee]

Hi.
I stained the front back & sides with the same water soluble dye, sealed top back & sides with the same shellac before spraying with StewMac Colortone water based lacuer sing a Wagner W550.

When I sprayed - all at the same tme - the back & sides turned out basically OK (with a run or two),...but the front turned out to have a sort of 'cracked' appearance or like a spider web patten or snake scales... I don't think I dd anything different...

I've sanded it all back, but I want to avoid a repetition.

Please shed some light on this if you're able...
Thanks, Rob

[echnidna]

either the stain or the shellack hadn't cured long enough before the finish coats

[old_picker]

i use this stuff a lot
instead of shellac use colortone sanding sealer

maybe the shellax was a little waxy - there is shellac and shellac

get a few thin coats of sealer on and level it hard, once youve got a level surface shoot up to 3 or 4 coats a day at 1-2 hour intervals depending on weather

sand it flat about every 6 coats after 12 you should let it gas off in a hot room for 2 weeks - the trick with this stuff is cure well, wet nd dry up to 1000 and dry sand from 1200 to 2500 then buff out - best ,mrror shine ever

i assume this is a guitar??

[fanlee]

i assume this is a guitar??

Yep.

Taylor T5 shape with P90's blackwood top.

If I get the burst right again it will look just like the pic in their brochure

Thanks for the tips.

Rob.

[MacS]

That could also happen if the gun is held to close to the work.

Two, your makng to many passes to fast and not allowing the solvent to flash off.

Three, you may not be keeping the coating well mixed and the materials were not balanced on the doors.

[old_picker]

Yep.

Taylor T5 shape with P90's blackwood top.

If I get the burst right again it will look just like the pic in their brochure

Thanks for the tips.

Rob.

post pics in the musical instrument forum
go on!!


by the way many light coats are way better than few heavy coats

[fanlee]

....post pics in the musical instrument forum
go on!!
.....


Almost ready to do that...

Just on the sanding out...why do you dry sand from 1200 up?

Also..I had binding isuues & scraped them to clean them up & to avoid a 'ridge' I padded on the colortone lacquer also to sort of seal them...it went on really well using the pad. It might be useful for smaller or fiddly bits every now & then.

Rob.

[old_picker]

just a tip mate
sand it wet above 1000 and you will see what i am talking about
a lacey pattern will show up - drysanding with clen new paper is the way to go