Dye for Sanding Gelcoat

[s/v Jedi]

Originally Posted by hlev00

Be sure to do a test using spray paint. It could be a real mess if it doesn't work out. Otherwise go for an actual guide coat such as from Rustoleum.
https://www.rustoleum.com/product-ca...de-coat-primer

Exactly, I think it’s cheap..

[Benz]

An auto-body shop where I get sandpaper cheaply has a guide-coat duster. Just some very fine black powder with a powder puff. Made by 3M.

[s/v Jedi]

Originally Posted by Benz

An auto-body shop where I get sandpaper cheaply has a guide-coat duster. Just some very fine black powder with a powder puff. Made by 3M.

Yes, that is the $75 product. The best, but if you need it only once for a small job… I used pencil

[Matt Johnson]

Mirka and Dura-gold sell dry guide coat for under $35 on Amazon.

[Spot]

In farm country, graphite powder can be had as a seed lubricant for farm machinery. 7$ US a pound. Some companies cut theirs with talc and sometimes it is marked up and marketed as an additive or slip plate lubricant or dry lube for locks, etc. . I use the 100% graphite type for metalcasting work to keep patterns from sticking in oil-bonded sand. You would need to figure out a dauber and a little goes a l-o-n-g way.

https://www.fleetfarm.com/detail/ez-...low-lubricant/