How to spray nitro over poly. Have you ever wanted to spray nitrocellulose over poly? The thing to consider when spraying nitrocellulose over polyurethane or a polyester guitar finish is that the nitro will need to key to the surface it's being sprayed to.
To remove the old poly finish I tried paint remover and a heat gun, neither of which were very good. Sandpaper worked a treat and I did two versions: one where I removed all the poly and one where I sanded the poly enough to make it not super smooth. In both cases I used 320/400 grit sand paper.
If you want to have a nice level finish, you'll need to build up a few coats of nitrocellulose sander sealer. Leave at least 30 minutes between coats and then leave the nitro to dry overnight.
Then use a few coats of nitro primer and again leave that overnight. Then it's time for the top coat. When spraying nitrocellulose I tend to do at least 4 coats, sometimes 8. This may mean spraying the colour coat over two days,
Finally I finish with a few coats of nitrocellulose satin.
Links to tools and some of the nitrocellulose sprays I use below.
➤ Affiliate Links
Below are affiliate links, meaning, at no cost to you, I will earn commission if you click through and make a purchase:
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Amazon US:
Orbital sander - https://amzn.to/47oXquv
Sandpaper - https://amzn.to/43XyEOT
Wet and Dry paper - https://amzn.to/3QtgbqA
Mask - https://amzn.to/3OqRecr
Full face mask - https://amzn.to/3Yoq9v8
Amazon UK:
Orbital sander - https://amzn.to/3OrCn1s
Sandpaper - https://amzn.to/3OJZUvV
Wet and Dry paper - https://amzn.to/45gllKv
Sander sealer - https://amzn.to/3rW70Vj
Dartford's Aged white - https://amzn.to/3rXNNTk
Mask - https://amzn.to/44VINgB
Full face mask - https://amzn.to/3QKYoLN
➤ Videos you may find interesting:
Candy apple red nitro - https://youtu.be/T9td9xf7P-s
➤Time Stamps
0:00 nitro over poly
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