Rustins GRMA230 230g Mahogany Grainfiller

Gave great results on the project I was working on

The trick with this product is to dilute the paste to a thin 'slip' with white spirit. In other words do not even think of applying the thick paste from the tin - you will simply mess up your expensive lumber. I apply the slip with a dough knife (as in cooking) this allows a smooth application with no mess. But, the slip will go into just about anything (it's very runny) so just to be safe, put something below the job, I used this on a piece of Sapele to fill up the small 'rising grain' holes that would have caused a problem when finishing. Apply it, let it dry (follow instructions) and then sand off, it disappears but the particles are embedded in any rising grain. NOTE: this is not a wood filler, buy wood filler for knot filling etc.

This product appears to do the job.For many years I used a neutral coloured grain filler, (originally from Gedge and Co., London) but a few years ago I had to switch to a German brand (white). Both these required the addition of rare earth powder pigments to colour, and the later used up an eye watering amount to achieve the required shades for the various jobs.I have only used this product once so far, for a Georgian Mahogany side table, and the colour from the tin was a reasonable match. It mixed well with white spirit and was easy to use, and I am sure having used it ,that I will be able to tint any future mixes with rare earth powders for colour matching. To this end I also bought a tin of Oak Grainfiller as well.I suspect, looking forward, I may become irritated by the small size of these tins, my old fillers came in 500g tins, more useful professionally, but that may just be a matter of more research.NB The information on the tin suggests tinting the filler with woodstains; I don't do this as pigment powders colour the grainfiller, without the danger of staining the wood you are filling.

Did a great job on some mahogany inserts I used on a guitar neck.

I love this stuff, which probably says a lot more about me than I'd like...Takes a bit of elbow grease to apply the thinned filler, and then sand down when dry, but is definitely worth the effort.I've used this to help prepare the finish on two home-made guitars and the results were brilliant; it left the back and sides as smooth as glass.